As a by-product of photosynthesis, what percentage of the Earth's atmosphere is oxygen?
A) 31 percent B) 21 percent C) 10 percent D) 41 percent E) 50 percent
Answer: B
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An example(s) that illustrate(s) natural selection
acting on behavioral traits that benefit individuals include(s) a. the effect of oxytocin on vole reproductive behavior. b. the different responses of young coastal and inland garter snakes to banana slugs. c. courtship behavior in sage grouses. d. the nest-decorating behavior of starlings. e. all of these.
How many chromosomes does a human germ cell contain during metaphase I and telophase II, respectively?
A. There are 23 chromosomes during metaphase I and 46 chromosomes during telophase II B. There are 46 chromosomes during metaphase I and 46 chromosomes during telophase II C. There are 23 chromosomes during metaphase I and 23 chromosomes during telophase II D. There are 46 chromosomes during metaphase I and 23 chromosomes during telophase II
Cushing's syndrome has shown to be a result of:
A) long-term excess of testosterone B) pancreas dysfunction C) long-term excess of glucocorticoids D) pineal dysfunction
Snake behavior in Wisconsin changes throughout the year. For example, a snake is _____
A) less active in winter because the food supply is decreased B) less active in winter because it does not need to avoid predators C) more active in summer because that is the period for mating D) more active in summer because it can gain body heat by conduction