The simplest eye structure, which is able to perceive light but not form an image, is called a

a. compound eye.
b. single-lens eye.
c. ocellus.
d. ommatidia.
e. photoreceptor.


C

Biology & Microbiology

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What moves the food from your mouth to your stomach when you swallow?

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Under which of the following situations would receptor down-regulation most likely occur?

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Some organisms are capable of orchestrating alterations that are collectively termed antigenic variation. This allows the organism to __________.

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