Evolution is sometimes described as the change from preexisting life -forms to modern-day organisms. What actually changes, in every case of evolution, is the
A) genetic makeup of the species, due to mutations.
B) ability of organisms to respond to external stimuli.
C) speciesʹ physical appearance.
D) energy and nutritional demands of the organism.
E) rate of reproduction.

Question

Quizplus · Accepted Answer

Evolution involves changes in the genetic makeup of a species over time, primarily due to mutations, natural selection, and genetic drift. These genetic changes can lead to variations in physical appearance, behaviors, and other traits, but it is the genetic makeup that fundamentally changes during the process of evolution.

Evolution Is Sometimes Described as the Change from Preexisting Life