Competition evolutionary history sperm

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Sperm Wars

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The Quarterly Review of Biology

Instead, the reproductive success of both sexes was higher when offspring were produced with several partners and when there were few unnecessary matings. Several features of the anatomy of the human penis are proposed to serve as adaptations to sperm competition, including the length of the penis and the shape of the penile head. In the second major section of the book, the author breaks his studies down into individual animal species and subgroupings of species. In the Canadian Arctic, paleontologists unearth fossils documenting the move of our ancestors from sea to land.
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