Water enters the sponge spongocoel through the:
a. choanocytes.
b. spicules.
c. ostia.
d. osculum.
e. pinocytes.
C
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The purpose of specialized lacunae are to:
a. provide structure to the rhizomes. b. carry oxygen to plant parts. c. provide buoyancy to the blade. d. both b and c
Species A and species B both benefit by living together. This is an example of
A. competition. B. commensalism. C. mutualism. D. succession.
Female peafowl (peahens) prefer to breed with males (peacocks) that have the longest tails. However, the longer the peacock's tail, the less well he can fly and the more likely he is to be eaten by predators
Which of the following statements is TRUE? A) Both sexual selection and natural selection favor shorter tails in peacocks. B) Sexual selection favors longer tails, but natural selection favors shorter tails. C) Sexual selection favors shorter tails, but natural selection favors longer tails. D) Both sexual selection and natural selection favor longer tails in peacocks.
Typically the final product of recombinant DNA technology is a