Ultraviolet light can cause permanent changes in genes. These changes are called

a. mutations.
b. enzymes.
c. fibrin.
d. promoters.
e. polypeptides.


A

Biology & Microbiology

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Which vitamin is produced in humans when exposed to sunlight?

a. A b. B1 c. C d. D e. folic acid

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Mycorrhizae are

a. the small roots in the root systems of trees. b. endosymbiotic bacteria associated with plant roots. c. fungus and root mutualistic associations. d. parasitic fungal infections of tree roots. e. endosymbiotic fungal cells associated with leaves.

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Consumption of vitamin C

a. enhances absorption of iron. b. limits absorption of iron. c. does not affect absorption of iron.

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Transmembrane movement of a substance with a concentration gradient utilizing a membrane protein is called ________.

Fill in the blank(s) with the appropriate word(s).

Biology & Microbiology