The photoreceptors are most tightly packed into a specific part of the retina called the ________

A) optic nerve
B) fovea
C) ciliary body
D) choroid


B

Biology & Microbiology

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All cancers are caused by viruses

A. true B. false

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Natural selection results in changes in ____

a. individuals b. populations c. kingdoms d. phyla e. animals only

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Which is a unique adaptation in insects not found in any other arthropod?

a. wings b. cephalization c. segmentation d. hard exoskeletons e. specialized mouthparts

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Which list represents the levels of organization in a multicellular organism from the simplest level to the most complex level?

a) organ system, organ, tissue, cell b) tissue, organ, organ system, cell c) Cell, tissue, organ system, organ d) cell, tissue, organ, organ system

Biology & Microbiology