Whether it is eggs or sperm being produced through meiosis, under normal circumstances, each gamete ends up with:
a) exactly two copies of each chromosome.
b)...
Which of the following is NOT a characteristic of Turner Syndrome?
Which of the following is NOT a characteristic of Turner Syndrome?
a) underdeveloped ovaries
b) web of skin between neck and shoulders
c) X_ genotype
d)...
Which of the following is NOT a characteristic of Klinefelter Syndrome?
Which of the following is NOT a characteristic of Klinefelter Syndrome?
a) long limbs
b) web of skin between the neck and shoulders
c) XXY genotype
d)...
The enzyme DNA polymerase catalyzes the DNA replication process during which of the following phases of the mitotic cell cycle?
The enzyme DNA polymerase catalyzes the DNA replication process during which of the following phases of the mitotic cell cycle?
a) Telophase
b) Prophase
c)...
The egg cells of a horse contain 32 chromosomes. How many chromosomes are in the horse's liver cells?
The egg cells of a horse contain 32 chromosomes. How many chromosomes are in the horse's liver cells?
a) 64 pairs
b) 8
c) 64
d) 32
e) 16
Answer: c)...
Telomeres have been directly linked to aging in humans. If scientists were able to develop treatments that could reverse the shortening of telomeres, would they be able to reverse the aging of humans?
Telomeres have been directly linked to aging in humans. If scientists were able to develop treatments that could reverse the shortening of telomeres,...
Radiation therapy for cancer works because a cell's DNA is exposed during mitosis and most vulnerable to damage from radiation. Because cancer cells are uncontrollably undergoing mitosis, they die when exposed to the treatment. The common side effects of radiation treatment are hair loss and vomiting. What does this imply?
Radiation therapy for cancer works because a cell's DNA is exposed during mitosis and most vulnerable to damage from radiation. Because cancer cells...
Seventy to ninety percent of the genetic material in a gamete made in your body could be inherited from your mother. How could this be?
Seventy to ninety percent of the genetic material in a gamete made in your body could be inherited from your mother. How could this be?
a) The X chromosome...
If a cell becomes arrested within the cell cycle because it is unable to replicate its DNA, which of the stages would your predict it would become arrested in?
If a cell becomes arrested within the cell cycle because it is unable to replicate its DNA, which of the stages would your predict it would become arrested...
Nondisjunction is the unequal distribution of chromosomes during meiosis. Nondisjunction can occur at two different points. Either the homologues fail to separate during meiosis I or:
Nondisjunction is the unequal distribution of chromosomes during meiosis. Nondisjunction can occur at two different points. Either the homologues fail...
Which of the following is TRUE about prokaryotic reproduction?
Which of the following is TRUE about prokaryotic reproduction?
a) A single circular DNA helix is replicated into two identical circular DNA helices.
b)...
What is the definition of "female"?
What is the definition of "female"?
a) producing the female reproductive system
b) producing the smaller, more motile gamete
c) producing the larger,...
In most bacteria, the DNA:
In most bacteria, the DNA:
a) is carried in a single linear chromosome.
b) is wrapped around proteins called histones.
c) is carried in multiple...
Healthy individuals may have just one sex chromosome, as long as it is an X chromosome. Why can't a person survive with a Y chromosome and no X chromosome?
Healthy individuals may have just one sex chromosome, as long as it is an X chromosome. Why can't a person survive with a Y chromosome and no X chromosome?
a)...
Naturally occurring chemicals in plants may be useful in inhibiting cancer. One of these chemicals that is found in grapes and peanuts is called:
Naturally occurring chemicals in plants may be useful in inhibiting cancer. One of these chemicals that is found in grapes and peanuts is called:
a)...
The centromeres separate and the separated chromosomes move toward opposite poles of the cell during which of the following phases of the mitotic cell cycle?
The centromeres separate and the separated chromosomes move toward opposite poles of the cell during which of the following phases of the mitotic cell...
If a cell containing 8 chromosomes divides by mitosis, how many chromosomes will be in each daughter cell?
If a cell containing 8 chromosomes divides by mitosis, how many chromosomes will be in each daughter cell?
a) 16
b) 4
c) 2
d) 26
e) 8
Answer:&...
A karyotype reveals:
A karyotype reveals:
a) the sex chromosomes but not the non-sex chromosomes.
b) the number, shapes, and sizes of chromosomes in an individual cell.
c)...
Which of the following statements about the cell cycle is NOT true?
Which of the following statements about the cell cycle is NOT true?
a) The Gap 2 phase immediately follows the Gap 1 phase.
b) Proteins are formed...
DNA replication is facilitated by the fact that the base on one strand of the double helix (T, for example) always has the same partner (A, in this case) on the other strand. This feature of DNA is called:
DNA replication is facilitated by the fact that the base on one strand of the double helix (T, for example) always has the same partner (A, in this...
In some species, sex is determined by environmental, rather than genetic, factors. This is true of:
In some species, sex is determined by environmental, rather than genetic, factors. This is true of:
a) humans.
b) turtles.
c) bees.
d) kangaroos.
e)...
The formation of a multicellular organism from a fertilized egg is called development. Development is accomplished through the processes of:
The formation of a multicellular organism from a fertilized egg is called development. Development is accomplished through the processes of:
a) mitosis...
In ants, sex determination:
In ants, sex determination:
a) is similar to that of humans, in which the father has one copy of each of two different sex chromosomes.
b) is based...
Metafemales" are:
Metafemales" are:
a) females with an XXX genotype.
b) females with an XX genotype.
c) females with an XXY genotype.
d) females with an XY genotype.
e)...
Errors sometimes occur when DNA duplicates itself. Why might that be a good thing?
Errors sometimes occur when DNA duplicates itself. Why might that be a good thing?
a) New genes can enter the population and be acted upon by evolution.
b)...
In many species of birds males are XX and females are XZ. With birds like this who is most likely to display a sex-linked recessive trait?
In many species of birds males are XX and females are XZ. With birds like this who is most likely to display a sex-linked recessive trait?
a) males
b)...
Crossing over takes place during:
Crossing over takes place during:
a) anaphase I of meiosis.
b) prophase I of mitosis.
c) prophase I of mitosis and meiosis.
d) prophase I of meiosis.
e)...
If a cell containing 10 chromosomes divides by mitosis, how many chromosomes will be in each daughter cell?
If a cell containing 10 chromosomes divides by mitosis, how many chromosomes will be in each daughter cell?
Answer: 1...
During which phase of the mitotic cell cycle does reassembly of nuclear envelopes occur?
During which phase of the mitotic cell cycle does reassembly of nuclear envelopes occur?
a) S-phase
b) anaphase
c) telophase
d) metaphase
e) proph...
The ability for cancer cells to divide indefinitely is made possible because:
The ability for cancer cells to divide indefinitely is made possible because:
a) cancer cells rebuild their centromeres after every cell division.
b)...
Which of the following does NOT occur in a cell during the mitotic cell cycle?
Which of the following does NOT occur in a cell during the mitotic cell cycle?
a) cytoplasm is divided
b) centromeres separate
c) sister chromatids...
A karyotype is a physical representation (usually a photograph) of all of the chromosomes in a single cell; however, the cell must be in mitotic metaphase when the karyotype is made. Why?
A karyotype is a physical representation (usually a photograph) of all of the chromosomes in a single cell; however, the cell must be in mitotic metaphase...
The spindle begins to assemble at which of the following phases of the mitotic cell cycle?
The spindle begins to assemble at which of the following phases of the mitotic cell cycle?
Answer: prophas...
Some fertility clinics now promise that a couple can choose the sex of their baby. What technique might allow for this?
Some fertility clinics now promise that a couple can choose the sex of their baby. What technique might allow for this?
a) Separating the father's...
What is the difference between embryonic development and differentiation?
What is the difference between embryonic development and differentiation?
a) Development and differentiation are really two words for the same thing.
b)...
Which is a likely explanation for why there are no data included on the graph for maternal ages above 45?
Which is a likely explanation for why there are no data included on the graph for maternal ages above 45?
a) In women over 45, the incidence of Down...
Between the stage in the cell cycle where the genetic material is replicated and the process of cell division begins there is a stage referred to as:
Between the stage in the cell cycle where the genetic material is replicated and the process of cell division begins there is a stage referred to as:
a)...
Which process is necessary to prevent the doubling of genome size during sexual reproduction?
Which process is necessary to prevent the doubling of genome size during sexual reproduction?
a) metastasis
b) meiosis
c) contact inhibition
d) apoptosis
e)...
Genes are borne on structures called:
Genes are borne on structures called:
a) gametes.
b) alleles.
c) cells.
d) nuclei.
e)chromosomes.
Answer: chromosomes...
The eukaryotic chromosome:
The eukaryotic chromosome:
a) consists of a single linear strand of double-stranded DNA.
b) consists of two linear strands of double-stranded DNA.
c)...
DNA replication is facilitated by the fact that the base on one strand of the double helix (T, for example) always has the same partner (A, in this case) on the other strand. This feature of DNA is called:
DNA replication is facilitated by the fact that the base on one strand of the double helix (T, for example) always has the same partner (A, in this...
Which of the following is the BEST definition of a homologous chromosome?
Which of the following is the BEST definition of a homologous chromosome?
a) one of two identical chromosomes held together by a centromere
b) the...
Which of the following is the direct product of DNA replication?
Which of the following is the direct product of DNA replication?
a) cytokinesis
b) the lining up of chromosomes in mitosis metaphase
c) two sister...
A man having the "super male" genotype, meaning he has one extra Y-chromosome (XYY) marries a woman who is "meta female," having an extra X-chromosome (XXX). All of the following are possible genotypes of their children, EXCEPT:
A man having the "super male" genotype, meaning he has one extra Y-chromosome (XYY) marries a woman who is "meta female," having an extra X-chromosome...
The linear strands of DNA in eukaryotes are efficiently packed within the nucleus of the cell. The packing of DNA strands are mediated by proteins called:
The linear strands of DNA in eukaryotes are efficiently packed within the nucleus of the cell. The packing of DNA strands are mediated by proteins called:
a)...
If a cell containing 6 chromosomes divides by mitosis, how many daughter cells will be produced?
If a cell containing 6 chromosomes divides by mitosis, how many daughter cells will be produced?
a) 24
b) 12
c) 6
d) 2
e) 3
Answer: ...
All of the following are cells that undergo mitosis, EXCEPT:
All of the following are cells that undergo mitosis, EXCEPT:
a) skin cells.
b) yeast.
c) stomach cells.
d) sperm cells.
e) muscle cells.
Answer: sperm...
Which of the following does NOT contribute to variability of the offspring in sexual reproduction?
Which of the following does NOT contribute to variability of the offspring in sexual reproduction?
a) a brother and a sister producing children together
b)...
Down syndrome results from which of the following chromosomal abnormalities?
Down syndrome results from which of the following chromosomal abnormalities?
a) translocation of genetic material on chromosome 21
b) all or part...
A cell is said to have reached the metaphase stage of mitosis when:
A cell is said to have reached the metaphase stage of mitosis when:
a) the chromatin condenses into chromosomes.
b) separation of the chromatids...
Sister chromatids are:
Sister chromatids are:
a) the result of crossing over.
b) single-stranded.
c) identical molecules of DNA resulting from replication.
d) homologous...
Chemotherapy is one common treatment for cancer. Which of the following are aspects of chemotherapy?
Chemotherapy is one common treatment for cancer. Which of the following are aspects of chemotherapy?
a) Drugs that interfere with cell division are...
The enzyme DNA polymerase is most active during which of the following phases of the mitotic cell cycle?
The enzyme DNA polymerase is most active during which of the following phases of the mitotic cell cycle?
a) Gap-2 (G2)
b) Gap-1 (G1)
c) Anaphase
d)...
Cytokinesis in both plant and animal cells results in the formation of which of the following?
Cytokinesis in both plant and animal cells results in the formation of which of the following?
a) centromeres
b) nuclear membranes
c) two daughter...
Which is the proper sequence of events in asexual cell division?
Which is the proper sequence of events in asexual cell division?
a) interphase ; prophase ; anaphase ; metaphase ; telophase ; cytokinesis
b) interphase...
In birds, sex determination:
In birds, sex determination:
a) is opposite to that of humans, in that the mother has one copy of each of two different sex chromosomes.
b) is similar...
Within interphase, which of the stages is defined by the active replication of the cell's genetic material?
Within interphase, which of the stages is defined by the active replication of the cell's genetic material?
a) the mitotic phase
b) the Gap 2 phase
c)...
The Gap 1, DNA Synthesis, and Gap 2 phases of the cell cycle are collectively called:
The Gap 1, DNA Synthesis, and Gap 2 phases of the cell cycle are collectively called:
a) mitosis.
b) cytokinesis.
c) M phase.
d) interphase.
e) prophase.
Answer: d)...
Mitosis produces TWO (2) daughter cells that:
Mitosis produces TWO (2) daughter cells that:
a) are haploid.
b) each have two chromosomes.
c) each have a different number of chromosomes than the...
If a cell containing 20 chromosomes divides by mitosis, a total of how many daughter cells will be produced?
If a cell containing 20 chromosomes divides by mitosis, a total of how many daughter cells will be produced?
Answer: ...
Chromosomes on which recombination takes place:
Chromosomes on which recombination takes place:
a) have a mixtures of maternal and paternal chromosomes.
b) are created during meiosis.
c) usually...
Sister chromatids line up at the center of the cell at which of the following phases of the mitotic cell cycle?
Sister chromatids line up at the center of the cell at which of the following phases of the mitotic cell cycle?
a) Gap-2
b) cytokenesis
c) Gap-1
d)...
Triplo-X syndrome is when a woman has an extra X chromosome. Using your knowledge of chromosomal inheritance, which of the following statements is most likely to be correct?
Triplo-X syndrome is when a woman has an extra X chromosome. Using your knowledge of chromosomal inheritance, which of the following statements is most...
During which stage of the mitotic cell cycle do the chromosomes decondense back to strands of chromatin and each set of separated genetic material becomes enclosed in a nuclear envelope to form two daughter nuclei?
During which stage of the mitotic cell cycle do the chromosomes decondense back to strands of chromatin and each set of separated genetic material becomes...
The DNA in linear eukaryotic chromosomes is wrapped around proteins called _____________, which keep the DNA from getting tangled and enable an orderly, tight, and efficient packing of the DNA inside the cell.
The DNA in linear eukaryotic chromosomes is wrapped around proteins called _____________, which keep the DNA from getting tangled and enable an orderly,...
Aneuploidy (an abnormal number of chromosomes) occurs due to one particular erroneous meiotic event called:
Aneuploidy (an abnormal number of chromosomes) occurs due to one particular erroneous meiotic event called:
a) nondisjunction (chromosomes don't separate).
b)...
Anaphase of mitosis occurs when:
Anaphase of mitosis occurs when:
a) the chromatids begin to separate from the metaphase plate.
b) the sister chromatids from the homologous pairs...
Cancer cells are different from other cells in that they have lost their "contact inhibition." "Contact inhibition" means:
Cancer cells are different from other cells in that they have lost their "contact inhibition." "Contact inhibition" means:
a) DNA replication in most...
The process of cytokinesis often occurs simultaneously with which phase?
The process of cytokinesis often occurs simultaneously with which phase?
a) telophase
b) anaphase
c) interphase
d) prophase
e) metaphase
Answer: a)...
Somatic cells can include:
Somatic cells can include:
a) kidney cells.
b) brain cells.
c) sperm cells.
d) All of the above are correct.
e) Both a) and b) are correct.
Answer: Both...
DNA replication occurs during the _____________ phase of the cell cycle.
DNA replication occurs during the _____________ phase of the cell cycle.
a) mitotic
b) DNA Synthesis
c) cytokinesis
d) Gap 1
e) Gap 2
Answer: DNA...
During metaphase II in meiosis a cell contains ________ of the DNA it did during prophase I.
During metaphase II in meiosis a cell contains ________ of the DNA it did during prophase I.
a) 1/4
b) 1/2
c) four times as much
d) twice as much
e)...
During DNA replication, each strand serves as a _____________ for the new ________________ strand.
During DNA replication, each strand serves as a _____________ for the new ________________ strand.
a) blueprint; template
b) master model; transcribed
c)...
Which of the following is NOT true about the human karyotype?
Which of the following is NOT true about the human karyotype?
a) It can be made from placental tissue.
b) It reveals the gender of the individual.
c)...
Which of the following is TRUE about sex determination in humans?
Which of the following is TRUE about sex determination in humans?
a) In the absence of a Y chromosome, the fetal gonads develop into testes, not ovaries.
b)...
The majority of a eukaryotic cell's life is spent in an "in-between-division" stage referred to as:
The majority of a eukaryotic cell's life is spent in an "in-between-division" stage referred to as:
a) dormant phase.
b) prophase.
c) static phase.
d)...
Cytokinesis:
Cytokinesis:
a) results in greater genetic diversity among daughter cells.
b) occurs during mitosis but not meiosis.
c) refers to the division of...
Animal cells have "counters" that keep track of how many times a cell has divided. These counters are called:
Animal cells have "counters" that keep track of how many times a cell has divided. These counters are called:
a) telomeres.
b) nucleomeres.
c) centromeres.
d)...
Nondisjunction:
Nondisjunction:
a) is the unequal division of the genetic material during cell division.
b) occurs only in prophase I of meiosis.
c) is the cause...
Down syndrome and other disorders where there are extra or missing copies of a chromosomes are the consequence of:
Down syndrome and other disorders where there are extra or missing copies of a chromosomes are the consequence of:
a) mitosis.
b) sex determination.
c)...
Bacteria reproduce asexually, whereas most plants and animals reproduce sexually. Which is the better method?
Bacteria reproduce asexually, whereas most plants and animals reproduce sexually. Which is the better method?
a) Asexual reproduction, because there...
The chromosomes of bacteria are:
The chromosomes of bacteria are:
a) circular.
b) capsular.
c) tetrahedral.
d) linear.
e) sickle-shaped.
Answer: a) circular...
Which of the following combinations of sex chromosomes is never seen in human beings?
Which of the following combinations of sex chromosomes is never seen in human beings?
a) XXY
b) YYY
c) XXX
d) XYY
e) X_ (also written as XO)
A...
The planned process of cell suicide is called:
The planned process of cell suicide is called:
a) denaturation.
b) metastasis.
c) apoptosis.
d) mitosis.
e) anastomosis.
Answer: apoptosi...
During meiosis, chromatin:
During meiosis, chromatin:
a) unwinds to allow tetrads to form.
b) binds to the metaphase plate, enabling chromosome division.
c) is the final DNA...
Cytokinesis in both plant and animal cells results in the formation of which of the following?
Cytokinesis in both plant and animal cells results in the formation of which of the following?
a) two haploid cells
b) centromeres
c) two daughter...
Which of the following are the three stages of interphase (in the mitotoc cell cycle)?
Which of the following are the three stages of interphase (in the mitotoc cell cycle)?
a) Gap-1, S-phase and Gap-2
b) Gap-1 and Gap-2
c) prophase...
Cancer cells differ from normal cells in two important aspects:
Cancer cells differ from normal cells in two important aspects:
a) a halting of all cell division and the ability to metastasize.
b) the ability to...
In multicellular organisms, the cells that undergo mitotic cellular division but not meiotic cell division are called:
In multicellular organisms, the cells that undergo mitotic cellular division but not meiotic cell division are called:
a) somatic cells.
b) somosis...
A karyotype:
A karyotype:
a) can be used to diagnose Down syndrome in humans.
b) reveals the autosomes but not the sex chromosomes.
c) can be used to determine...
Which of the following explains the fact that the Y chromosome carries nonessential information?
Which of the following explains the fact that the Y chromosome carries nonessential information?
a) A man who inherits two or three Y chromosomes as...
In multicellular organisms, cells that undergo mitotic division but not meiotic division are called _____ cells.
In multicellular organisms, cells that undergo mitotic division but not meiotic division are called _____ cells.
a) somosis
b) skin
c) germ
d) somatic
e)...
The interphase stage in the eukaryotic cell cycle has the subgroups:
The interphase stage in the eukaryotic cell cycle has the subgroups:
a) Gap, Synthesis, and Condensing.
b) Gap 1, Synthesis 1 and Synthesis 2
c) Gap...
Eukaryotic cells can divide by:
Eukaryotic cells can divide by:
a) segregation only.
b) replication only.
c) mitosis only.
d) meiosis only.
e) both mitosis and meiosis.
Answer: e)...
During which phase of the cell cycle do the chromosomes align in one plane at the center of the cell?
During which phase of the cell cycle do the chromosomes align in one plane at the center of the cell?
a) Interphase
b) Prophase
c) Metaphase
d) Anaphase
e)...
Which of the following statements about the similarities and difference between chemotherapy and radiation therapy as cancer treatments is INCORRECT?
Which of the following statements about the similarities and difference between chemotherapy and radiation therapy as cancer treatments is INCORRECT?
a)...
Which of the following is the correct order of the stages of mitotoc cell cycle (starting with Interphase (Gap-1)?
Which of the following is the correct order of the stages of mitotoc cell cycle (starting with Interphase (Gap-1)?
a) Interphase (Gap-1), Prophase,...
How does crossing over introduce variation in meiosis?
How does crossing over introduce variation in meiosis?
a) It positions alleles next to each other that previously were not together.
b) It causes...
Which is NOT true about a pair of homologous chromosomes?
Which is NOT true about a pair of homologous chromosomes?
a) omeres in the same location.
b) One homologue is of paternal origin, while the other...
Which of the following is NOT a disadvantage of sexual reproduction?
Which of the following is NOT a disadvantage of sexual reproduction?
a) Variability among offspring enables parents to produce a range of offspring,...
Which of the following does NOT occur during Prophase I of meiosis?
Which of the following does NOT occur during Prophase I of meiosis?
a) Crossing over between tetrads occurs.
b) Spindle is formed.
c) Homologous pairs...
Which of the following is the BEST definition of a homologous chromosome?
Which of the following is the BEST definition of a homologous chromosome?
a) The central area that joins two chromatids
b) One of two identical chromosomes...
During meiosis but NOT during mitosis:
During meiosis but NOT during mitosis:
a) two identical daughter cells are produced.
b) chromosomes line up in the center of the cell during metaphase.
c)...
Binary fission is to asexual reproduction as __________ is to __________.
Binary fission is to asexual reproduction as __________ is to __________.
a) dividing into two; genetically different offspring
b) dividing into four;...
Without histones, eukaryotic DNA most likely would be:
Without histones, eukaryotic DNA most likely would be:
a) much longer than it is.
b) attached to a large number of stick proteins.
c) found in a...
Which of the following is TRUE about meiosis in men and women?
Which of the following is TRUE about meiosis in men and women?
a) Sperm production results in four cells from one starting cell; for eggs, only one...
Odometer is to an old, rusty car as __________ is to __________.
Odometer is to an old, rusty car as __________ is to __________.
a) asexual reproduction; sexual reproduction
b) DNA replication; cell division
c)...
Which of the following is the best way to distinguish male from female?
Which of the following is the best way to distinguish male from female?
a) Males are more brightly colored.
b) Males are more aggressive.
c) Males...
_________ marks the break in the cell cycle between the end of mitosis and beginning of the synthesis stage.
_________ marks the break in the cell cycle between the end of mitosis and beginning of the synthesis stage.
a) Gap 1
b) cytokinesis
c) DNA Synthesis...
Which of the following conditions is the result of too few sex chromosomes.
Which of the following conditions is the result of too few sex chromosomes.
a) Down syndrome
b) "Metafemales"
c) Turner syndrome
d) Klinefelter...
Which of the following is NOT a disadvantage of sexual reproduction?
Which of the following is NOT a disadvantage of sexual reproduction?
a) It takes time and energy to find a mating partner.
b) The transfer of genetic...
Mitosis results in:
Mitosis results in:
a) gametes.
b) daughter cells with twice as much genetic material and a unique collection of alleles.
c) daughter cells with...
Odometer is to an old, rusty car as __________ is to __________.
Odometer is to an old, rusty car as __________ is to __________.
a) telomere; a cell after 50 cell divisions
b) circular chromosome; linear chromosome
c)...
If DNA replication occurs by unwinding and rebuilding, then:
If DNA replication occurs by unwinding and rebuilding, then:
a) the two resulting DNA molecules are an unpredictable mixture of old and newly synthesized...
Which of the following is TRUE about prokaryotic reproduction?
Which of the following is TRUE about prokaryotic reproduction?
a) Four cells are produced from a single parent cell.
b) Mitosis is used.
c) A single...
Programmed cell death, or __________, takes place particularly in parts of the body where the cells are likely to accumulate significant genetic damage over time and are therefore at high risk of becoming cancerous.
Programmed cell death, or __________, takes place particularly in parts of the body where the cells are likely to accumulate significant genetic damage...
Hermaphrodites are organisms such as earthworms and garden snails that produce both male and female _________.
Hermaphrodites are organisms such as earthworms and garden snails that produce both male and female _________.
Answer: gamete...
Using a light microscope, it is easiest to see chromosomes:
Using a light microscope, it is easiest to see chromosomes:
a) during mitosis and meiosis because the condensed chromosomes are thicker and therefore...
What type of chromosomal abnormality leads to the phenotype known as Down syndrome?
What type of chromosomal abnormality leads to the phenotype known as Down syndrome?
a) trisomy 22
b) trisomy 21
c) monosomy 21
d) monosomy 22
e)Either...
Gymnosperms and angiosperms have the following in common except
Gymnosperms and angiosperms have the following in common except
A) seeds.
B) pollen.
C) vascular tissue.
D) ovaries.
E) ovules.
Answer: ...
Which of the following is not a characteristic that distinguishes gymnosperms and angiosperms from other plants?
Which of the following is not a characteristic that distinguishes gymnosperms and angiosperms from other plants?
A) alternation of generations
B)...
With respect to angiosperms, which of the following is incorrectly paired with its chromosome count?
With respect to angiosperms, which of the following is incorrectly paired with its chromosome count?
A) egg-n
B) megaspore-2n
C) microspore-n
D) zygote-2n
E)...
A fruit is most commonly
A fruit is most commonly
A) a mature ovary.
B) a thickened style.
C) an enlarged ovule.
D) a modified root.
E) a mature female gametophyte.
Ans...
Where in an angiosperm would you find a megasporangium?
Where in an angiosperm would you find a megasporangium?
A) in the style of a flower
B) inside the tip of a pollen tube
C) enclosed in the stigma of...
A botanist was visiting a tropical region for the purpose of discovering plants with medicinal properties. All of the following might be ways of identifying potentially useful plants except
A botanist was visiting a tropical region for the purpose of discovering plants with medicinal properties. All of the following might be ways of identifying...
Which of the following is not a valid argument for preserving tropical forests?
Which of the following is not a valid argument for preserving tropical forests?
A) People in the tropics do not need to increase agricultural output.
B)...
What is the greatest threat to plant diversity?
What is the greatest threat to plant diversity?
A) insects
B) grazing and browsing by animals
C) pathogenic fungi
D) competition with other plants
E)...
Over human history, which process has been most important in improving the features of plants that have long been used by humans as staple foods?
Over human history, which process has been most important in improving the features of plants that have long been used by humans as staple foods?
A)...
The fruit has light, fibrous plumes.
The fruit has light, fibrous plumes.
A) animal skin, fur, or feathers
B) animal digestive tract
C) water currents
D) gravity and terrain
E) air c...
The fruit has a heavy weight and spheroidal shape.
The fruit has a heavy weight and spheroidal shape.
A) animal skin, fur, or feathers
B) animal digestive tract
C) water currents
D) gravity and terrain
E)...
The fruit contains an air bubble.
The fruit contains an air bubble.
A) animal skin, fur, or feathers
B) animal digestive tract
C) water currents
D) gravity and terrain
E) air curr...
The fruit is covered with spines or hooks.
The fruit is covered with spines or hooks.
A) animal skin, fur, or feathers
B) animal digestive tract
C) water currents
D) gravity and terrain
E)...
The fruit is made of material high in calories.
The fruit is made of material high in calories.
A) animal skin, fur, or feathers
B) animal digestive tract
C) water currents
D) gravity and terrain
E)...
The fruit of the mistletoe, a parasitic angiosperm, is a one-seeded berry. In members of the genus Viscum, the outside of the seed is viscous (sticky), which permits the seed to adhere to surfaces, such as the branches of host plants or the beaks of birds. What should be expected of the fruit if the viscosity of Viscum seeds is primarily an adaptation for dispersal rather than an adaptation for infecting host plant tissues?
The fruit of the mistletoe, a parasitic angiosperm, is a one-seeded berry. In members of the genus Viscum, the outside of the seed is viscous (sticky),...
Which feature of honeybees probably arose under the mutual evolutionary influence of insect-pollinated flowering plants?
Which feature of honeybees probably arose under the mutual evolutionary influence of insect-pollinated flowering plants?
A) possessing three pairs...
Many mammals have skins and mucous membranes that are sensitive to phenolic secretions of plants like poison oak (Rhus). These secondary compounds are primarily adaptations that
Many mammals have skins and mucous membranes that are sensitive to phenolic secretions of plants like poison oak (Rhus). These secondary compounds are...
In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg?
In a typical angiosperm, what is the sequence of structures encountered by the tip of a growing pollen tube on its way to the egg?
1. micropyle
2....
A plant whose reproductive parts produce nectar is also most likely to
A plant whose reproductive parts produce nectar is also most likely to
A) have brightly colored reproductive parts.
B) produce sweet-tasting fruit.
C)...
Angiosperms are the most successful terrestrial plants. Which of these features is unique to them and helps account for their success?
Angiosperms are the most successful terrestrial plants. Which of these features is unique to them and helps account for their success?
A) wind pollination
B)...
Which of the following flower parts develops into the pulp of a fleshy fruit?
Which of the following flower parts develops into the pulp of a fleshy fruit?
A) stigma
B) style
C) ovule
D) ovary
E) micropyle
Answer: ...
Which of the following flower parts develops into a seed?
Which of the following flower parts develops into a seed?
A) ovule
B) ovary
C) fruit
D) style
E) stamen
Answer: ...
Hypothetically, one of the major benefits of double fertilization in angiosperms is to
Hypothetically, one of the major benefits of double fertilization in angiosperms is to
A) decrease the potential for mutation by insulating the embryo...
How many chromosomes should be in a megasporangium nucleus?
How many chromosomes should be in a megasporangium nucleus?
A) 4
B) 8
C) 16
D) 24
E) 32
Answer: ...
How many chromosomes should be in an embryo nucleus?
How many chromosomes should be in an embryo nucleus?
A) 4
B) 8
C) 16
D) 24
E) 32
Answer: ...
How many chromosomes should be in an embryo sac nucleus?
How many chromosomes should be in an embryo sac nucleus?
A) 4
B) 8
C) 16
D) 24
E) 32
Answer: ...
How many chromosomes should be in a generative cell nucleus?
How many chromosomes should be in a generative cell nucleus?
A) 4
B) 8
C) 16
D) 24
E) 32
Answer: ...
How many chromosomes should be in an endosperm nucleus?
How many chromosomes should be in an endosperm nucleus?
A) 4
B) 8
C) 16
D) 24
E) 32
Answer: ...
How many chromosomes should be in a tube cell nucleus?
How many chromosomes should be in a tube cell nucleus?
A) 4
B) 8
C) 16
D) 24
E) 32
Answer: ...
Which structure(s) must pass through the micropyle for successful fertilization to occur in angiosperms?
Which structure(s) must pass through the micropyle for successful fertilization to occur in angiosperms?
A) one sperm nucleus
B) two sperm nuclei
C)...
Arrange the following structures from largest to smallest, assuming that they belong to two generations of the same angiosperm.
Arrange the following structures from largest to smallest, assuming that they belong to two generations of the same angiosperm.
1. ovary
2. ovule
3....
In flowering plants, meiosis occurs specifically in the
In flowering plants, meiosis occurs specifically in the
A) spore mother cells.
B) gametophytes.
C) endosperm.
D) gametes.
E) embryos.
Answer:&n...
How have fruits contributed to the success of angiosperms?
How have fruits contributed to the success of angiosperms?
A) by nourishing the plants that make them
B) by facilitating dispersal of seeds
C) by...
Among plants known as legumes (beans, peas, alfalfa, clover, etc.) the seeds are contained in a fruit that is itself called a legume, better known as a pod. Upon opening such pods, it is commonly observed that some ovules have become mature seeds, whereas other ovules have not. Thus, which of these statements is/are true?
Among plants known as legumes (beans, peas, alfalfa, clover, etc.) the seeds are contained in a fruit that is itself called a legume, better known as...
Angiosperm double fertilization is so-called because it features the formation of
Angiosperm double fertilization is so-called because it features the formation of
A) two embryos from one egg and two sperm cells.
B) one embryo from...
The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does the generative cell undergo to produce these sperm cells?
The generative cell of male angiosperm gametophytes is haploid. This cell divides to produce two haploid sperm cells. What type of cell division does...
Which is a true statement about angiosperm carpels?
Which is a true statement about angiosperm carpels?
A) Carpels are features of the gametophyte generation.
B) Carpels consist of anther and stamen.
C)...
Carpels and stamens are
Carpels and stamens are
A) sporophyte plants in their own right.
B) gametophyte plants in their own right.
C) gametes.
D) spores.
E) modified spo...
Which of these statements is true of monocots?
Which of these statements is true of monocots?
A) They are currently thought to be polyphyletic.
B) The veins of their leaves form a netlike pattern.
C)...
Which of the following is a structure of angiosperm gametophytes?
Which of the following is a structure of angiosperm gametophytes?
A) immature ovules
B) pollen tubes
C) ovaries
D) stamens
E) sepals
Answer:&nb...
The seeds of orchids are among the smallest known, with virtually no endosperm and with miniscule seed leaves. Consequently, what should one expect to be true of such seeds?
The seeds of orchids are among the smallest known, with virtually no endosperm and with miniscule seed leaves. Consequently, what should one expect...
What adaptations should one expect of the seed coats of angiosperm species whose seeds are dispersed by frugivorous (fruit-eating) animals, as opposed to angiosperm species whose seeds are dispersed by other means?
What adaptations should one expect of the seed coats of angiosperm species whose seeds are dispersed by frugivorous (fruit-eating) animals, as opposed...
The dispersal and/or nurture of young after hatching from the egg
The dispersal and/or nurture of young after hatching from the egg
A) endosperm
B) pollen tube and sperm nuclei
C) carpels
D) fruit
E) integuments...
The internal fertilization that occurs prior to shell deposition
The internal fertilization that occurs prior to shell deposition
A) endosperm
B) pollen tube and sperm nuclei
C) carpels
D) fruit
E) integuments
...
The shell of an animal egg
The shell of an animal egg
A) endosperm
B) pollen tube and sperm nuclei
C) carpels
D) fruit
E) integuments
Answer: ...
The yolk and/or albumen of an animal egg
The yolk and/or albumen of an animal egg
A) endosperm
B) pollen tube and sperm nuclei
C) carpels
D) fruit
E) integuments
Answer: ...
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