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1) The sperm cell has no muscles.

2) When the creature matures, the parasitic sperm cells eat out its gonads and replace them with themselves.

3) A sperm cell develops from a sperm mother cell.

4) In a sperm cell,(http://sentencedict.com/sperm cell.html) a specialized set of tiny support proteins (protamines) pack the DNA down to about one-sixth the volume of a mitotic chromosome.

5) Agnew also found that the hellbender sperm cell—like those of other amphibian species—boasts a ribbon of tissue encircling the tail.

6) A human sperm cell contains just one copy each of 23 chromosomes.

7) The embryo and sperm cell nuclei are stained purple while sperm tails are green.

8) Second, the DNA in a sperm cell is super - condensed and compacted into a highly dense form.

9) Third, the head of a sperm cell is almost all nucleus.

10) Fertilization: Only one sperm cell penetrates the outer layer of the cell.

11) The vaccine works by blocking male sperm cell from joining female egg cell.

12) It is a well-documented fact that guys will not ask for directions. This is a biological thing. This is why it takes several million sperm cells... to locate a female egg, despite the fact that the egg is, relative to them, the size of Wisconsin. Dave Barry 

13) A miniature, fully formed individual believed by adherents of the early biological theory of preformation to be present in the sperm cell.

14) Before the discovery of the egg cell, many scientists believed that the head of each sperm cell contained a fully "preformed" little person ( homunculus ).

15) How can an X chromosome be nearly as big as the head of the sperm cell?

16) The ovum develops only in the female, and the sperm cell develops only in the male.