The processing of sensory input in animals leads to ____
a. an adaptation
b. a sensation
c. an action
d. feeling exactly what is happening at the site
e. responding to the stimulus
ANSWER: b
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Live-bearing reproduction, or viviparity, has apparently evolved ____
a. just three separate times b. about 200 separate times in vertebrates alone c. only in mammals d. only once, although many groups lost it secondarily e. about 15 separate times
How many levels of consumption are depicted
in the figure? a. 1 b. 2 c. 3 d. 4 e. 5
Early successional species are characterized by
A) low body growth rates. B) smaller body size. C) low degree of dispersal. D) low per capita population growth rate.
Helicobacter pylori can grow in the stomach because it
A) hides in macrophages. B) makes a capsule. C) possesses an enzyme that neutralizes HCl. D) makes HCl. E) invades epithelial cells.