Which developmental defect occurs when ecdysone signaling prematurely activates throughout a monarch butterfly pupae wing imaginal disc?

💡 Explanation

When ecdysone signaling prematurely activates, inappropriate expression of genes controlling wing vein differentiation occurs because signaling gradients become disrupted before the disc has fully differentiated, leading to altered specification. Therefore disrupted vein patterning results, rather than abnormal coloration, developmental delay, or wing loss which require different hormonal imbalances or mutations.

• Which consequence results when complex birdsong deviates rhythmically?
• Which aerodynamic effect predominantly sustains soaring flight in albatrosses near stable temperature inversions above the ocean?
• Which outcome results when nectar quality diminishes, altering a dance?
• Which immune outcome results when gut microbiomes decline after antibiotic use?
• Which outcome results when a specific larval hormone production ceases?
• Which outcome occurs when repeated low-dose venom exposure triggers immunity?