The mystery of giant sperm present in some living animal groups today has now taken on a new dimension -- in one group of micro-crustaceans new evidence shows that it is a feature at least 100 million years old.
Plants & Animals
Jun 18, 2009
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No human is a clone of their parents but the same cannot be said for other living things. While your DNA is a combination of half your mother and half your father, other species do things differently. The advantage of clonal ...
Cell & Microbiology
Jun 9, 2009
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A new study reveals that - contrary to decades of evolutionary thought - chromosome regions that are prone to breakage when new species are formed are a rich source of genetic variation.
Cell & Microbiology
Apr 23, 2009
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(PhysOrg.com) -- Understanding how living cells originated and evolved into their present forms remains a fundamental research area in biology, one boosted in recent years by the introduction of new tools for genomic analysis. ...
Cell & Microbiology
Apr 22, 2009
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An Emory University study shows some of the first direct evidence of a process required for epigenetic reprogramming between generations - a finding that could shed more light on the mechanisms of fertilization, stem-cell ...
Cell & Microbiology
Apr 16, 2009
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In contrast to women, men are fertile throughout life, but research at the Sahlgrenska Academy, University of Gothenburg, Sweden, has now shown that a fertilising sperm can get help from the egg to rejuvenate. The result ...
Cell & Microbiology
Mar 25, 2009
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Biologists at the University of Leicester have published results of a new study into plant sex - and discovered that a particular gene switches on 'the essence of male'.
Cell & Microbiology
Mar 20, 2009
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In plant pollen grains, sperm cells, which carry the genetic material to be passed on to progeny, are cocooned within larger "companion" cells that are called pollen vegetative cells. These companions provide sperm with ...
Feb 5, 2009
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Scientists at the Instituto Gulbenkian de Ciência (IGC), in Portugal, are to date the only research group in the world capable of isolating the sperm cells in the pollen grain of the model plant Arabidopsis thaliana. This ...
Feb 5, 2009
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Living with a female mouse can extend the reproductive life of a male mouse by as much as 20 percent, according to a study conducted by Ralph Brinster and a team of other researchers at the University of Pennsylvania School ...
Jan 22, 2009
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