(PhysOrg.com) -- Biologists have shown that independent but similar molecular changes turned a harmless digestive enzyme into a toxin in two unrelated species -- a shrew and a lizard -- giving each a venomous bite.
Plants & Animals
Oct 29, 2009
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The sperm of male fruit flies are coated with a chemical 'sex peptide' which inhibits the female's usual afternoon siesta and compels her into an intense period of foraging activity.
Plants & Animals
Sep 30, 2009
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(PhysOrg.com) -- Intermittent signaling by steroid hormones can affect the way genes are expressed in rodents, according to research by scientists at the University of Bristol and the National Cancer Institute (NCI), USA. ...
Cell & Microbiology
Aug 19, 2009
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Scientists at Michigan State University have found exposure to the hormone progesterone activates genes that trigger inflammation in the mammary gland.
Cell & Microbiology
Aug 19, 2009
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Researchers have found a way to directly convert spermatogonial stem cells, the precursors of sperm cells, into tissues of the prostate, skin and uterus. Their approach, described this month in the journal Stem Cells, may ...
Cell & Microbiology
Jul 28, 2009
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A new 3-minute test could help in diagnosing prostate cancer, the most common cancer in men in the UK, according to scientists.
Biochemistry
May 19, 2009
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The carnivorous reptiles (Varanus komodoensis) are known to bite prey and release them, leaving them to bleed to death from their wounds: the victims are reported to go into shock before the dragons kill and eat them.
Plants & Animals
May 18, 2009
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(PhysOrg.com) -- When it comes to wooing females, males of all species -- even fruit flies -- try to gain a competitive edge.
Plants & Animals
Apr 14, 2009
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(PhysOrg.com) -- As a girl, Elaine Fuchs borrowed her mother’s old strainers and mixing bowls to collect polliwogs, an activity she credits for her present-day career as a biologist.
Cell & Microbiology
Mar 24, 2009
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Researchers at the Johns Hopkins Malaria Research Institute (JHMRI) have identified the molecular components that enable the malaria-causing parasite Plasmodium to infect the salivary glands of the Anopheles mosquito—a ...
Jan 16, 2009
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