What effect do high frequency sounds tend to have on the ear?
A. displace the whole length of the basilar membrane with a maximum near the apex
B. move only the basal portion of the basilar membrane
C. move only the apex portion of the basilar membrane
D. move only the portion of the basilar membrane between the basal portion and the apex
E. only move the tectorial membrane
B. move only the basal portion of the basilar membrane
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What do we call populations of organisms that are usually near the carrying capacity?
A. K-selected B. r-selected C. predators D. parasites E. perennials
Which is the predominant second messenger involved in regulating glucose metabolism?
a. insulin b. glucagon c. adenyl cyclase d. cyclic AMP e. G protein
Which type of vessel is one cell layer in thickness?
a. artery b. arteriole c. capillary d. venule e. vein
Most animals seek to maximize the energy they obtain while minimizing their
A. energy expenditure. B. risk of predation and territory size. C. risk of predation. D. territory size. E. energy expenditure and risk of predation.