Chapter 22: Q. 14 (page 570)
Pseudopeptidoglycan is a characteristic of the walls of ________.
a. eukaryotic cells
b. bacterial prokaryotic cells
c. archaean prokaryotic cells
d. bacterial and archaean prokaryotic cell
Pseudopeptidoglycan is characteristic of the walls of archaean prokaryotic cell walls.
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Explain the statement that both types, bacteria and archaea, have the same basic structures, but built from different chemical components.
Microbial mats __________.
a. are the earliest forms of life on Earth
b. obtained their energy and food from hydrothermal vents
c. are multi-layered sheets of prokaryotes including mostly bacteria but also archaea
d. all of the above
The presence of a membrane-enclosed nucleus is a characteristic of ________.
a. prokaryotic cells
b. eukaryotic cells
c. all cells
d. viruses
Prokaryotes that obtain their energy from chemical compounds are called _____.
a. phototrophs
b. auxotrophs
c. chemotrophs
d. lithotrophs
Which of these occurs through symbiotic nitrogen fixation?
a. The plant benefits from using an endless source of nitrogen.
b. The soil benefits from being naturally fertilized.
c. Bacteria benefit from using photosynthates from
the plant.
d. All of the above occur.
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