Which risk increases if a bird species adapts toward highly slotted primary feathers?

💡 Explanation

Increased slotting separates airflow, thus increasing drag; this is the tradeoff. Birds use separated flow to soar effectively via induced drag reduction. If a bird evolves highly slotted feathers for soaring, therefore, its flapping flight requires more energy, rather than facilitating parasite resistance.

• Which physiological risk arises if peripheral vasodilation happens prematurely during arousal from mammalian hibernation?
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• Which environmental effect decreases photosynthetic efficiency in C3 plants compared to C4 plants in warmer climates?
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