In the text example, the change in moth populations
from predominantly light- to dark-winged forms was
the result of
a. environmental changes.
b. natural selection.
c. food choices by predators.
d. the ability of birds to find the prey.
e. all of these.
Answer: e
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All of the following statements about cellular trafficking are true except
A) COPII-coated vesicles move materials from ER to Golgi. B) COPI-coated vesicles move materials from Golgi to the secretory vesicle. C) movement may be mediated by microtubules. D) v-SNAREs occur in vesicles; t-SNAREs occur on target sites. E) tethering proteins mediate docking between target and vesicle.
Which of the following is an advantage to a manufacturer's operating transnational commodity chains?
A) economies of scale B) able to use world's cheapest labor costs C) lack of dependence upon a single supplier D) economies of scale, the ability to use the world's cheapest labor costs, and the lack of dependence upon a single supplier
Predators can switch to alternative prey when a prey species is low in abundance as is shown in ____
a. type I response b. type II response c. type III response d. types I and III e. types I, II and III
Why is methionine the first amino acid to be added to every polypeptide chain?
What will be an ideal response?