Which of the following is a characteristic of both archaea and bacteria?
A)Classified in the domain Eukarya
B)Lack a nucleus and membrane bound organelles
C)Lack histones
D)Have ether linkages in cell membranes
Answer: B
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Microorganisms
- _______ type of Bacteria that has acidic polysaccharides.
- Scientists know that the first living organisms were _________. However, it is not known whether these organisms were ________ or ________
- What features are possessed by all complex multicellular organisms?
- Source of new genetic variation are:
- Examples of new genetic variations include:
- How endosymbiosis relates to the eukaryote evolution?
- Amoeboid movement is carried out using structures called _________________
- Certain protists use a long whip-like structures called _______________ to swim.
- Tiny hairlike structures called ________ are characteristic of certain protists.
- The Gram-stain divides bacteria into two main types based on?
- In aquatic bacteria, hollow gas filled tubes which help in buoyancy, are called _________.
- Bacteria and archaea are the Earth's?
- ________ are bacterial cells with unusually tough protein coats that are released upon the death of their parent cell.
- Gram-negative bacteria have a thin peptidoglycan layer, and are enclosed by a thin outer envelope rich in _________________
- The green algae that are most related to land plants are known as _____________ algae.
- The phylum _____________ includes flagellates known as cryptomonads.
- The phylum _____________ is known as red algae.
- The phylum _____________ includes most other green algae.
- The supergroup ______________ includes the multicellular animals and fungal kingdoms and related protists.
- Which group of protists listed below is monophyletic?
- Algae are mostly ______________ protists.
- Fungus-like protists and protozoa are ____________ protists.
- ________, also known as macroalgae, are photosynthetic protists that are large enough to see with the naked eye.
- __________ Protists attach themselves to underwater surfaces such as rocks, sand, and plants.
- __________ Protists swim or float in fresh or salt water, together with planktonic bacteria, viruses and small animals.