Which consequence results when a moth larva experiences ecdysteroid deficiency below a critical threshold?

💡 Explanation

Insects need ecdysteroids triggering molting; a deficiency results in incomplete shedding of the old exoskeleton because ecdysis requires a certain ecdysteroid concentration. Therefore, incomplete molting occurs, rather than skipping to pupation or differentiation stages which need higher levels.

• Which outcome decreases when a hummingbird experiences localized blockage in its air sacs?
• Which outcome occurs when a marine mammal dives into icy water and surface blood vessels experience dramatic vasoconstriction?
• Which outcome occurs when blood flow stalls during countercurrent exchange within fish gills at cold temperatures?
• During bird migration over large bodies of water, which outcome commonly occurs when a storm suddenly disrupts the flock's cohesion?
• Which outcome predictably occurs when avian flight feathers experience excessive bending during high-speed flight?
• Which process causes increased turgor pressure, assisting transport?