Some strains of haloarchaea exhibit
A) anoxic growth at the expense of sugar fermentation.
B) anaerobic respiration.
C) anoxygenic photosynthesis.
D) light-driven ATP synthesis under oxygen-limiting conditions.
Answer: D
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Which of these groups is least closely related to the
other four? a. green algae b. red algae c. brown algae d. plants e. all of the above are equally closely related
In 1964, the Skipper, Gilligan, and their passengers are shipwrecked! Unknown to them, the rest of the world annihilates each other in a nuclear warm and they are the last 17 people on the earth. What evolutionary force would be primarily responsible for the genetic makeup of remaining human 2,000 years later?
A. Natural selection B. Genetic drift C. Gene flow D. Mutation E. Non-random mating
One spring, your friend living in Minnesota eagerly sets up her new hummingbird feeders, and is thrilled to watch hummingbirds feeding on the nectar. However, she is disappointed when after just a week or two the hummingbirds disappear. What advice would you give her?
A. Set up a bell (conditioned stimulus) near the feeders so the hummingbirds make an association with the food. B. Set up flashing red lights that mimic the male neck feathers -- that should attract more males to the area. C. Wait till next year -- hummingbirds are a high-metabolism, semelparous species and have already reproduced and died. D. Set up the feeders again in the fall. The hummingbirds may have briefly traveled through during their annual spring migration.
Which division of the nervous system regulates the activity of smooth muscle, cardiac muscle, and glands?
A. Sympathetic nervous system B. Antagonistic nervous system C. Autonomic nervous system D. Limbic nervous system E. Parasympathetic nervous system