alleryThe Bt toxin used in pest resistant crops comes from a:
AWheat plant
BBacterium
CGreen alga
DBread mould
Answer & Solution
Correct answer: B. Bacterium
1. The toxin gene was cloned out of a microbe.
2. That microbe is Bacillus thuringiensis.
3. Bacillus thuringiensis is a bacterium.
_Source: syllabus Biology, Ch 10 'Biotechnology and its Applications'_
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