Rare Example of Darwinism Seen in Action

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An ovary of the live-bearing placental fish Poeciliopsis prolifica. At image center is a late stage embryo with the network of blood vessels of the placenta. In the background are a one-cell embryo and embryos at earlier stages. Image courtesy of Mic ...
An ovary of the live-bearing placental fish, Poeciliopsis prolifica. At image center is a late stage embryo with the network of blood vessels of the placenta. In the background are a one-cell embryo and embryos at earlier stages. Image courtesy of Michael O’Neill, University of Connecticut, the lead author of the research paper.

A research team of biologists has found experimental evidence that supports a controversial theory of genetic conflict in the reproduction of those animals that support their developing offspring through a placenta.


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All News summaries for July 30, 2007

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