Which constraint affects wing morphogenesis within a butterfly pupa's imaginal discs during metamorphosis?

💡 Explanation

During metamorphosis, spatial patterning, controlled by morphogen gradients, governs the differentiation and organization of cells within the imaginal discs, defining the wing structure. Therefore, spatial patterning constrains wing morphogenesis, rather than sclerotization, pressure, or nutrient depletion which do not primarily direct cellular pattern.

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