What are cry1Ac and cry2Ab in context of Bt crops ........

Environment and Ecology Biodiversity

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What are cry1Ac and cry2Ab in context of Bt crops?

They are proteins produced by a bacteria

They are viruses which affect Bt cotton

They are names of Bt cotton seeds

They are farm techniques which are used to produce Bt cotton.

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Explanation:

They are toxic proteins produced by a bacillus Thuringiensis. They are incorporated into crop plants which cause death of insects once they ingest the toxins.
In B. thuringiensis-transgenic (Bt) cotton, production of both Cry1Ac and Cry2Ab has been proposed to delay resistance of Heliothis virescens (tobacco budworm).
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