Uptake of low-density lipoproteins (LDLs) occurs by

A) simple diffusion.
B) bulk-phase endocytosis.
C) facilitated transport.
D) receptor-mediated endocytosis.
E) pinocytosis.


D) receptor-mediated endocytosis.

Biology & Microbiology

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Which ions are important for establishing the resting potential in neurons?

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Directional selection occurs when

a. the environment controls which organisms will survive. b. humans determine which organisms will survive. c. the extremes of the population have a lesser chance to survive. d. the extremes of the population have a better chance to survive. e. the organisms on one extreme of the population have a better chance to survive than those on the other extreme.

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Which is NOT a biogeographic realm?

a. Palearctic b. Ethiopian c. Equatorial d. Oriental e. Australian

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Small animals, such as water striders and water spiders, can run across a pond's surface due to ________

Fill in the blank(s) with correct word

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