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Bacillus thuringiensis spores sprayed on brassicas kill:

AButterfly caterpillars
BSap-sucking aphids
CMosquito larvae in ponds
DFungal spores on leaves
Answer & Solution
Correct answer: A. Butterfly caterpillars
1. The toxin is released in the larval gut. 2. Bt kills butterfly caterpillars. 3. Other insects are unharmed. _Source: syllabus Biology, Chapter 10, Microbes in Human Welfare._
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