stripedshiver stripedshiver

23-04-2019
Biology

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Describe one shark from the Cenozoic era. What does the shark look like (include an image)?

( make it simple, please. )

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Аноним Аноним

23-04-2019

Sharks belong to a family of fish that have skeletons made of cartilage, a tissue more flexible and lighter than bone. ... The upper side of a shark is generally dark to blend in with the water from above and their undersides are white or lighter colored to blend in with the lighter surface of the sea from below.

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