When carbon dioxide levels in the blood rise the ____
a. rate of breathing decreases
b. depth of breathing decreases
c. activity of the central chemoreceptors decreases
d. amount of oxygen in the blood rises
e. pH of the cerebrospinal fluid falls
ANSWER: e
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The range of all factors that influence whether a species can obtain resources essential for survival and reproduction is
its ____. a. habitat b. ecological niche c. carrying capacity d. ecosystem e. community
Which of the following statements is false?
a. All vertebrates have a ventral tubular nervous system. b. All vertebrates have a tail at some stage in their life cycle. c. All vertebrates have a notochord at some stage in their life cycle. d. All vertebrates have pharyngeal gill slits at some stage in their life cycle. e. None of these are false.
Beta diversity, or turnover, would be at its minimum if all species occurred in all habitats within a region. Beta diversity would be at its maximum if each habitat had a unique biota, and regional diversity would equal:
A) the mean of the local diversities of all the habitats within the region. B) the sum of the local diversities of all the habitats within the region. C) the largest among the local diversities of all the habitats within the region. D) the smallest among the local diversities of all the habitats within the region.
The fold of the dura containing the superior sagittal sinus is the:
a. transverse fissure b. tentorium cerebelli c. faux cerebri d. faux cerebelli