Are synonyms? I'm guessing thats the answer.
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You must do this by yourself because nobody here is aware of what the rubric is for this. I'm sorry, I would help if I could.
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The reason lies in the structure of the eye itself. Nocturnal animals tend to have proportionally bigger eyes than humans do. They also tend to have pupils that open more widely in low light. So, at the outset, nocturnal eyes gather more light than human eyes do.
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