Which risk escalates if avian primary feathers lack sufficient interlocking barbules?

💡 Explanation

If interlocking barbules are insufficient, feathers lose cohesion impacting leading-edge airfoil shape to maintain lift and prevent turbulent airflow and stall at lower airspeeds. Therefore airfoil stall risk increases, rather than insulation, mites, or bone density, which relate to feather structure or diet influencing bird resilience.

• Which outcome occurs when mutations disrupt the function of imaginal disc homeobox genes in Drosophila?
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• Which aerodynamic mechanism allows soaring birds to maintain altitude in stable conditions without flapping?
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• Which outcome results when countercurrent exchange in fish gills is impaired near highly polluted effluent discharge?
• When subjected to high temperatures, which consequence follows elevated transpiration in plants?