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← Nature & AnimalsWhich outcome occurs when migratory salmon consistently fail to locate natal rivers?
A)Increased genetic drift in populations✓
B)Enhanced food web stability downstream
C)Decreased habitat competition with resident fish
D)Improved resilience to stochastic events
💡 Explanation
Repeated homing failures prevent successful reproduction and gene flow, because disruption of olfactory imprinting causes inability to use their 'olfactory maps.'; therefore, populations can exhibit increased genetic drift, rather than retaining stable gene pools.
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