Adult male humans generally have deeper voices than adult female humans due to higher levels of testosterone causing larynx growth. Excluding gender, the pattern apparent in the fossil record most closely resembles: A. Pansexual selection B. Directional selection C. Disruptive selection D. Stabilizing selection
Biology · High School · Tue Nov 03 2020
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The pattern seen in the fossil record where adult male humans generally have deeper voices than adult female humans due to higher levels of testosterone causing larynx growth is most akin to:
B. Directional selection.
Directional selection is a type of natural selection where a particular trait within a population shifts towards one extreme over time due to environmental pressures or other selective forces. In this case, the shift towards deeper voices in adult males, driven by hormonal factors like testosterone influencing larynx growth, represents a directional change in the trait (voice pitch) within the human population.