ScienceDaily: Top Environment News |
| Yosemite's alpine chipmunks take genetic hit from climate change Posted: 19 Feb 2012 11:33 AM PST Global warming has driven Yosemite's alpine chipmunks to higher ground, prompting a startling decline in the species' genetic diversity, according to a new study. The genetic erosion occurred in the relatively short span of 90 years, highlighting the rapid threat changing climate can pose to a species.  |
| Surprising molecular switch: Lipids help control the development of cell polarity Posted: 19 Feb 2012 11:32 AM PST In a standard biology textbook, cells tend to look more or less the same from all sides. But in real life cells have fronts and backs, tops and bottoms, and they orient many of their structures according to this polarity explaining, for example, why yeast cells bud at one end and not the other.  |
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