Crystals of Bt toxin produced by some bacteria do not kill the bacteria themselves because –

A. bacteria are resistant to the toxin


B. toxin is immature;


C. toxin is inactive;


D. bacteria encloses toxin in a special sac.


C. toxin is inactive;

Bacillus thuringiensis is the bacteria which produces Bt toxins and it is inactive until pest attacks the plant and when it does the toxin get into active state and affects the insects or pests.


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