Which developmental consequence occurs when imaginal discs in Drosophila lack ecdysone receptors?

💡 Explanation

When imaginal discs lack ecdysone receptors, proper hormonal signaling for metamorphosis is disrupted because ecdysone cannot trigger the transcription of genes responsible for adult structure development. Therefore, the wings fail to properly develop, rather than premature molting, extended lifespan or duplicated boundaries, which occur through other signaling pathways.

• Which risk increases when asynchronous feather molting occurs?
• Which instar results if ecdysone declines before competence?
• Which outcome occurs when elevated CO2 causes decreased stomatal conductance during drought?
• Which acoustic outcome occurs when a bat's sonar frequencies shift downward sharply?
• Which outcome primarily affects a bird's stalling speed when wing loading dramatically increases?
• Which developmental constraint directly limits discontinuous growth for arthropods during molting stages?