Which process directly triggers the pupal stage during insect metamorphosis?

💡 Explanation

When ecdysone secretion exceeds juvenile hormone levels, the prothoracic gland stimulates molting by secreting ecdysone, but the absence of JH commits the larva to pupation. Therefore pupation results, rather than larval molting, inhibition of growth, or oxygen regulation which have different signaling mechanisms.

• Which consequence results when increasing leaf temperature compromises mangrove rubisco?
• Which mortality outcome primarily arises when Batesian mimicry fails during avian predation?
• Which challenge arises when C3 plants close stomata?
• Which signaling failure arises when hive temperature exceeds a critical limit, impairing clarity in bee waggle dances?
• Which outcome occurs when migratory salmon consistently fail to locate natal rivers?
• Which consequence results when magnetic particle deposition disrupts an avian ‘light-dependent compass’?