The structure in the eye that is similar to a camera diaphragm, regulating the size of the opening for light is the
A. retina.
B. pupil.
C. lens.
D. iris.
E. ciliary muscle.
Answer: D
Biology & Microbiology
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Pathogenic microorganisms and their hosts live in a close association with one another known as:
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How many different types of chromosomes do humans possess?
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Fuels such as gasoline are nonpolar and have high potential energy because they are largely composed of
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