Which developmental problem arises if imaginal discs fail to receive ecdysone signal during metamorphosis?

💡 Explanation

When imaginal discs don't receive ecdysone, cell differentiation into adult structures does not occur because ecdysone triggers the genetic cascade for metamorphosis. Therefore, the absence of adult structures results, rather than premature differentiation, exoskeleton changes, or lipid disruption, which involve distinct hormonal pathways.

• Which mechanism is most critical for preventing cellular damage during the arousal phase of mammalian hibernation?
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• Which outcome accompanies the release of norepinephrine activating uncoupling protein 1 (UCP1) in a hibernating mammal's brown adipose tissue?
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• Which risk increases for soaring birds during heavy molting resulting in primary feather loss?
• Which risk increases when mesophyll photosynthesis rate limits sugar production?