Which selective pressure favors bioluminescence in deep-sea anglerfish?

💡 Explanation

Counterillumination reduces silhouettes, because matching ventral bioluminescence intensity to downwelling light intensity conceals the fish; therefore cryptic adaptation via bioluminescence helps avoid predators rather than enhanced radiative defense or increasing light capture efficiency.

• Which outcome results when soil lacks symbiotic bacteria near soybean plants?
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• Which developmental constraint could prevent full expression of imaginal disc morphology during metamorphosis?
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