Question

the phenotype frequency in a population changes after each generation. which would most likely be causing this?
a. mates are chosen randomly
b. there are unlimited resources.
c. all organisms are able to reproduce.
d. organisms compete for shelter.

Explanation:

When organisms compete for shelter (a form of natural selection pressure), it can lead to changes in phenotype frequencies over generations. Random mate - choice (A) is a Hardy - Weinberg equilibrium condition and doesn't cause frequency change. Unlimited resources (B) also align with Hardy - Weinberg (no selection pressure). All organisms being able to reproduce (C) is a Hardy - Weinberg condition (no selection). Competition for shelter (D) creates a selective force that can alter phenotype frequencies.

Answer:

D. Organisms compete for shelter