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Question 1:
Why do most fish, reptiles, amphibians, and birds appear green?
A. They are able to change their color in order to camouflage themselves
B. Because most of them feed on green plants
C. Their skin contains a specific green pigment
D. Because of a reflection of blue light coming through an over-layer of yellow pigment

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Trivial Practice Quiz general - Test 153 | Englishfreetest.com