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Frogs mount speedy defense against pesticide threat

from Nature

Several species of frogs can quickly switch on genetic resistance to a group of commonly used pesticides. In one case, wood frogs (Lithobates sylvaticus) were able to deploy such defenses in just one generation after exposure to contaminated environments, scientists reported at a conference of the Ecological Society of America in Baltimore, Maryland. This is the first-known example of a vertebrate species developing pesticide resistance through a process called phenotypic plasticity, in which the expression of some genes changes in response to environmental pressure1. It does not involve changes to the genes themselves, which often take many generations to evolve. more


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