Biology, 26.01.2021 17:50, Buxtoman8431

Sperm cells are to enable them to egg cells. To do this they need to travel long distances - relative to their size - to reach the , then break through to the and fertilise it (combine the sperm DNA with the egg DNA).

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Sperm cells are to enable them to egg cells. To do this they need to travel long distances - relativ...