Polar bears are top predators, and tests on their
tissues have shown a surprising
a. resistance to warming.
b. amount of protein.
c. resistance to disease.
d. amount of mercury and organic pesticides.
e. evidence of none of these
D
Biology & Microbiology
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The ________ is a complex network of interconnected filaments and tubules that extends throughout the cytosol, from the nucleus to the inner surface of the plasma membrane.
A) cytoskeleton B) microtubule apparatus C) cell scaffold D) desmin sheath E) microfilament array
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Most available carbon is present as ____
a. CO2 b. CaCO3 c. C d. HCO3¯ e. N2
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An antagonist to a receptor decreases the number of messengers bound to the receptor.
a. true b. false
Biology & Microbiology