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chillywilly4242 chillywilly4242
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7 years ago
Emma has tritanopia. When she looks around at the world, she sees shades of red and green. Her defect is caused by a lack of:
 
  a. blue cones.
  b. red cones.
  c. green cones.
  d. yellow cones.
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tommy7234324tommy7234324
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