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← Nature & AnimalsWhich developmental consequence results when ecdysone receptors fail to activate in specific larval imaginal discs during pupation?
A)Adult structure malformation in segmented regions✓
B)Larval cuticle retention due to failed molting
C)Complete developmental arrest before metamorphic stage
D)Premature sclerotization triggered by juvenile hormone
💡 Explanation
When ecdysone doesn't activate receptors in imaginal discs, proper segment-specific differentiation fails because these discs dictate adult structures, yielding defects during final segmentation. Therefore, malformed adult legs or wings result, rather than failed molting, full developmental arrest or premature hardening, which involve different hormonal and cellular processes.
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