News tagged with species

Related topics: climate change , extinction , plants , biodiversity , plos one

Can inhaled oxygen cause cancer?

The ancient physician/alchemist, Paracelsus, said: "The dose makes the poison." According to a new study published in PeerJ, even oxygen may fall prey to the above adage. While essential to human life, aspect ...

Jan 13, 2015
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Restoring vision to the blind

Scientists have long known that species such as amphibians and fish can regenerate retinal cells—so why can't mammals? This and related questions are the premise for the third report from the Albert and ...

Jan 07, 2015
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Specific oxidation regulates cellular functions

For a long time, hydrogen peroxide has been considered as a dangerous metabolite that can damage cells through oxidation. This, however, is not its only role in the cell. Scientists from the German Cancer Research Center ...

Dec 18, 2014
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Species

In biology, a species is:

There are many definitions of what kind of unit a species is (or should be). A common definition is that of a group of organisms capable of interbreeding and producing fertile offspring, and separated from other such groups with which interbreeding does not (normally) happen. Other definitions may focus on similarity of DNA or morphology. Some species are further subdivided into subspecies, and here also there is no close agreement on the criteria to be used.

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