Among known plant species, which of these have been the two most commonly occurring phenomena that have led to the origin of new species?
1. allopatric speciation
2. sympatric speciation
3. sexual selection
4. polyploidy
A) 1 and 3
B) 1 and 4
C) 2 and 3
D) 2 and 4
Answer: D
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Biology Chapter 24
- Which of the following is not a function of LDLs?
- Which of the following best defines negative nitrogen balance?
- Which of the following food groups are considered good sources of complete proteins?
- Conditions that promote the oxidative deamination and energy use of amino acids include ________.
- When a person's hypothalamic thermostat is set to a higher level and the actual body temperature is below that level, the person may ________.
- Glucose can be obtained from ________.
- Which of the following is correct?
- Which of the choices below is not a source of glucose during the postabsorptive state?
- What process primes a molecule to change in a way that increases its activity, produces motion, or does work?
- Oxidation reduction reactions ________.
- Select the correct statement about proteins.
- Which of the following is not true of beta oxidation?
- Which of the following does not occur in the mitochondria?
- Which of the following nutrients yield the highest amount of energy per gram when metabolized?
- Which food type is considered to be the most important for athletes to eat to improve performance?
- Which of the following statements is a false or incorrect statement?
- Which of the choices below is not a major route of heat exchange?
- The primary reason elderly people should decrease their caloric intake is that ________.
- Many factors influence BMR. What is the most critical factor?
- When ketone bodies are present in the blood and urine in large amounts, it usually indicates increased metabolism of ________.
- The amount of ________ produced is probably the most important hormonal factor in determining BMR.
- Heat-loss mechanisms do not include ________.
- In the liver, the amine group of glutamic acid is removed as ________ in the oxidative state.
- Which of the choices below is not a mechanism of heat production?
- In gluconeogenesis, during the postabsorptive state, amino acids and ________ are converted to glucose.