People with a large amount of which tissue are least
likely to be sensitive to cold?
a. cartilage
b. adipose
c. blood
d. dense connective
e. bone
Answer: b
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Ring species such as the greenish warbler complicate the biological species concept because (select all correct choices)
A. at least some of their populations are reproductively isolated from one another but can still exchange genetic material. B. at least some of their populations overlap spatially, but individuals in those populations do not interbreed with one another. C. individuals in at least some populations interbreed with individuals from other species. D. ring species comprise populations that are in the process of allopatric speciation. E. none of these
An action potential is propagated down an unmyelinated neuron plasma membrane because
a. the action potential stimulates voltage-gated Na+ channels adjacent to it. b. the action potential stimulates voltage-gated Ca2+ channels adjacent to it. c. the action potential stimulates voltage-gated K+ channels adjacent to it. d. the action potential stimulates voltage-gated Na+ and Ca2+ channels adjacent to it. e. the action potential stimulates voltage-gated k+ and Ca2+ channels adjacent to it.
What is a disadvantage to having an
exoskeleton?
a. muscles do not work effectively b. the body tissues are unprotected by it c. it does not grow with the animal d. it prevents the possibility of flying e. more than one of these is a disadvantage to an exoskeleton
Species level is more inclusive than order.
a. true b. false