alleryWhy must a caterpillar eat leaves sprayed with Bacillus thuringiensis spores for this control to work?
AToxin is released in its gut
BThe spores remove leaf nitrogen
CThe leaves lose their chlorophyll
DThe spores block plant pollination
Answer & Solution
Correct answer: A. Toxin is released in its gut
Bt spores are sprayed onto vulnerable plants. After larvae ingest them, toxin is released in the larval gut and kills the larvae.
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