What is the name given to membranes that only allow certain materials to pass through them?
a) Osmosis
b) Diffusion
c) Impermeable
d) Selectively permeable
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How does an enzyme lower the energy of activation needed for a chemical reaction?
What will be an ideal response?
The latency period of syphilis is ________.
A. 20 years or longer B. 10 years C. 3 to 6 months D. 1 year
Through initial observation, research led by Naud and Hanlon showed that the main adaptation in behavior, that increases reproductive success of a male in the cuttlefish Sepia apama, is
A. None of the answer choices is correct. B. to change color and mimic another female, because the females are solitary and do not allow any males near them. C. an altruistic trade, in which females allow a large male to mate with them in exchange for protection from predators during the vulnerable gestation period. D. guarding the females from subsequent mating attempts by other males. E. the use of the male's arms to sort and mix the eggs and sperm, to ensure successful fertilization before he leaves the female.
The process of specialization by a cell is called ___.
Fill in the blank(s) with the appropriate word(s).