Dibenzoylhydrazines are a category of molecules that have been used as insecticides. They work by blocking ecdysteroid receptors. How does this kill an insect?
A. The insect cannot molt.
B. The chitinous exoskeleton is dissolved.
C. The insect can no longer excrete nitrogenous wastes.
D. The insect can no longer coordinate its movements.
Answer: A
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