What is the primary function of melanin?

A. to increase light absorption

B. to decrease water loss

C. to increase muscle strength

D. to absorb UV light

E. to increase synthesis of vitamins


D. to absorb UV light

Biology & Microbiology

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Four of the five structures listed below are found in

at least some protists. Select the exception. a. cell membrane b. pili c. mitochondrion d. eyespot e. food vacuole

Biology & Microbiology

The complementary base that hydrogen bonds with thymine in a DNA double helix is ________

A) uracil B) thymine C) guanine D) adenine E) cytosine

Biology & Microbiology

We are unable to exert any conscious control over the contraction of smooth or cardiac muscle. These muscles are referred to as ________ muscle

Fill in the blank(s) with correct word

Biology & Microbiology

Botulism will always be a threat for people who

A. are meat eaters. B. are vegetarians. C. have a weakened immune system. D. consume home-preserved foods. E. eat a lot in restaurants.

Biology & Microbiology