Texas A&M University (TAMU) BIOL112 Introductory Biology II Lab Exam 1 Practice Exam

Differential survival is significant in the study of evolution because it directly influences the changes in allele frequencies within a population over generations. This concept is fundamental to natural selection, where individuals with traits better suited to their environment tend to survive and reproduce more than those with less advantageous traits. As a result, the alleles responsible for those advantageous traits become more common in the population over time, leading to evolutionary changes.

This process highlights how certain traits are favored under specific environmental conditions, ultimately driving the adaptation of populations. Changes in allele frequencies can lead to the emergence of new species or variations within a species and are a key mechanism through which evolution operates. The other options do not accurately reflect the role of differential survival; for instance, it does not ensure equal survival of all phenotypes or prevent mutations, nor does it lead to an equal distribution of alleles across a population.