scikmirovic scikmirovic

26-03-2017
Biology

contestada

Why do some vertebrates appear to fit into two or more different
classes?

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kellyyy4 kellyyy4

26-03-2017

All vertebrates are, by nature, in two classes : the male class and the female class. Only some invertebrates like the earthworm, water snail etc are in single class with both male and female organs in the same body.

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