The diffusion of water across a selectively permeable membrane is

A. facilitated diffusion.
B. active transport.
C. simple diffusion.
D. osmosis.
E. phagocytosis.


D. osmosis.

Biology & Microbiology

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Which type of pathway is responsible for melanin production: a biosynthetic pathway, signal transduction pathway, or developmental pathway?

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The gametophyte generation of ferns is the:a

prothallus. b. protonema. c. fiddlehead. d. gemma. e. thallus

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Describe the general relationship that may exist between mutations and cancer

What will be an ideal response?

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One of the ways that cells balance anabolism and catabolism is to

A) use feedback inhibition to shut down a pathway that is not needed. B) use the same enzyme to run a reaction in both the catabolic and anabolic direction. C) use the same enzyme to run a reaction in both the catabolic and anabolic direction and use feedback inhibition to shut down a pathway that is not needed. D) use separate coenzymes such as NAD+ vs. NADP+ for catabolic vs. anabolic pathways. E) use feedback inhibition to shut down a pathway that is not needed and use separate coenzymes such as NAD+ vs. NADP+ for catabolic vs. anabolic pathways.

Biology & Microbiology