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← Nature & AnimalsWhich developmental outcome occurs when ecdysone receptor genes lack expression?
A)Premature adult structure morphogenesis fails to start✓
B)Larval molting completes independent from body size
C)Pupation prematurely starts irrespective of instar
D)Complete metamorphosis halts at the pupal stage
💡 Explanation
Morphogenesis fails because proper ecdysone signaling initiates insect molting and metamorphosis via sequential activation and repression of target genes, therefore lacking receptors blocks adult transformation rather than altering larval molting or pupation timing.
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