Which group in the peacock butterfly experiment had the highest survival rates?
a. Those with more nocturnal habits
b. Those without spots and without hissing/clicking sounds
c. Those without spots but with hissing/clicking sounds
d. Those with spots and hissing/clicking sounds
e. Those with the same flower habitat as the birds
ANSWER: d
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Comb-jellies, or ctenophores, are similar to cnidarians in that they (select all that apply):
A. are radially symmetrical. B. have two tissue layers surrounding a gelatinous interior. C. differentiate muscle cells and a simple nerve net. D. digest prey within their gastric cavity. E. none of these
During sexual intercourse
a. the female's labia swells with blood. b. pelvic thrusting stimulate mechanoreceptors. c. inward flow of blood exceeds outward flow in the penis and it becomes erect. d. heart and breathing increase in both sexes. e. all of these occur.
Which of the following is not one of the functions of the cytoskeleton?
a. To provide a structural framework for the cell b. Cell locomotion c. Protein translocation into the ER d. Intracellular movement of organelles and other structures
What scientific concept did Charles Darwin and Alfred Wallace independently discover?
a) sexual reproduction b) mutation c) overbreeding d) natural selection