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In many humans, exposing the skin to sunlight over prolonged periods of time results in the production of more pigment by the skin cells (tanning). this change in skin color provides evidence that -
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Biology, 22.06.2019 13:00
Substances that can pass through cell membranes by diffusion include a. na ions. b. proteins c. glucose. d. oxygen.
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Biology, 22.06.2019 17:30
Which statement best addresses the differences in sex cell differentiation between the red-eared slider turtle and a human?
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The model illustrates a process by which a substance is taken up by a cell. which statements describe the process? a. the model shows the process of endocytosis. b. the process shown in the model requires energy from the cell. c. the cell membrane in the model remains intact throughout the process. d. the model shows the process of facilitated diffusion.
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Each peripheral nerve provides innervation to peripheral structures....
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