Some of the characteristics of Bt cotton are:

Long fiber and resistance to aphids

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Medium yield, long fiber and resistance to beetle pests.

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High yield and production of toxic protein crystals which kill dipteran pests

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High yield and resistance to bollworms

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Solution

The correct option is D High yield and resistance to bollworms
Bt toxin genes were isolated from Bacillus thuringiensis and incorporated into the cotton plant to form a genetically modified crop called Bt cotton. This variety was highly resistant to bollworms and thus produced a higher yield.
Hence the correct statement with regards to BT cotton is "High yield and resistance to bollworms".

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A farmer wants to increase his crop yield using high yielding and pest resistant varieties of seeds. Which of the following biology experts should he consult?

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Column I Column II
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Q. Name the genes responsible for making Bt cotton plants resistant to bollworm attack. How do such plants attain resistance against bollworm attacks? Explain.

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