Question

Adult male humans generally have deeper voices than do adult female humans, which is the direct result of higher levels of testosterone causing growth of the larynx. If the fossil records of apes and humans alike show a trend toward decreasing larynx size in adult females and increasing larynx size in adult males, then

Answer 1

Answer:

Disruptive selection

Explanation:

In population of organism where natural selections favoured organism with large size, and relatively large ,but selected against the small in the  population in relation to a particular traits is called disruptive selection

In this case man has a large larynx, female has small , but apes are in the middle with little sized larynx,. Thus apes are intermediate between the two extremes sizes   of larynx.

Thus natural selection selected  against them, and disrupted them from the population, while favouring extreme sizes of larynx of  man and woman.

Answer 2

Answer:

Disruptive selection

Explanation:

Disruptive selection, also known as diversifying selection, describes changes in population genetics where extreme values for a trait are favored over intermediate values. In this case, the variance of the trait increases and the population is divided into two distinct groups. In this more individuals acquire peripheral character value at both ends of the distribution curve.