The diffusion of water across a selectively permeable (biological) membrane is

A. a rare occurrence.
B. active transport.
C. a process that always requires proteins.
D. always beneficial to a cell.
E. osmosis.


E. osmosis.

Biology & Microbiology

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An ommatidia is part of a:

A. single-lens eye. B. compound eye. C. eyecup. D. All of the answer options are correct.

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What is the key concept addressed by the question?

What will be an ideal response?

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The ultimate source of energy for living things is:

a. the Krebs cycle b. fossil fuels c. the sun d. oxygen e. aerobic respiration

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What are the predicted phenotypes of the male children from the union of a woman who is

heterozygous for hemophilia and a man who has normal blood clotting characteristics? (Use the Punnett square to verify your answer.) a. all normal b. 3 normal : 1 hemophilia c. 1 hemophilia : 1 normal d. 1 hemophilia : 3 normal e. all hemophiliacs

Biology & Microbiology