Archaea are characterized by several unique structural and metabolic features that confer an ability to grow in extreme environments, or those in which energy availability is too low to support growth of bacteria or eukaryotes
What are four metabolic capabilities that Archaea possess that enable them to survive in
extreme environments on Earth such as hydrothermal vents, acid mine water, the rumens of
cows, or salty waters?
What will be an ideal response?
Answers will vary
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When oxygen is depleted, the citric acid cycle stops. What could we add to the system to restore activity (other than oxygen)?
What will be an ideal response?
Proteins that are functionally less important for the survival of an organism generally evolve _____ more important proteins
A. more slowly than B. more quickly than C. at the same rate as
Which group of protists consumes CO2 and produces O2 for much of Earth, serving as the base of food webs in lakes, streams, and the oceans?
A. algae B. radiolarians C. amoeba D. protozoa E. slime mold
The photosystem channels the excitation energy gathered by absorption of light by any one of the pigment molecules to a specific reaction center chlorophyll, which in turn passes the energy to
A. photosystem II. B. cytochrome. C. photosystem I. D. the secondary electron center. E. the primary electron acceptor.