How do complex adaptations usually evolve?
A) By a single large step due to a highly adaptive mutation
B) By many small steps, but only when each is an improvement over the last step
C) By many small steps, but only when each has a minimal effect on fitness
D) By single large steps, but only when natural selection is strong

Question

Quizplus · Accepted Answer

Complex adaptations usually evolve by many small steps, where each step is an improvement over the last step. This process is called cumulative selection, where each small improvement is maintained by natural selection and leads to further improvements in the adaptation over time. This gradual process allows for the evolution of complex adaptations without requiring a highly adaptive mutation or strong selection pressure.

How Do Complex Adaptations Usually Evolve