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everlyn85 everlyn85
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6 years ago
There are many types of sensory receptors, starting from the very simple nerves that receive pain to very complex receptors, including those in the ______ of the eye, which collects all the input necessary for sight.
 
  a. retina
  b. iris
  c. pupil
  d. lashes
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somedaysundaysomedaysunday
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6 years ago
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