The experiment shown above demonstrates:
a. the inheritance of acquired characteristics.
b. a selective disadvantage to mice with coats that match the color of their environment.
c. a selective advantage to mice with coats that match the color of their environment.
d. A and B.
e. A and C.
C
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Which of the following are fetal membranes? (Check all that apply.)
_____ chorion _____ endometrium _____ allantois _____ amnion _____ yolk sac
The male sex hormone testosterone is secreted in response to a hormone secreted by the _____
a. testes c. pituitary gland b. ovaries d. pancreas
Which of the following is true about the length of food chains?
A. Food chains can support up to 10 trophic levels. B. An ecosystem with a high-enough number of species will feature a limitless length of food chain. C. Energy lost as heat at each trophic level limits the length of food chains. D. The extinction of a species in a food chain will affect only the species directly preying upon it. E. Food chains are shorter in stable habitats.
Which of the following is not an autotroph?
a. yeast b. oak tree c. cyanobacterium d. algae e. grass