Parallel evolution occurs when
A) unrelated species have evolved structures with similar functions
B) closely related animals have developed similar characteristics that have evolved independently
C) unrelated species develop similar characteristics that are dependent on one another
D) related species have identical vestigial organs
E) unrelated organisms develop different adaptations to similar environments

Question

Quizplus · Accepted Answer

Parallel evolution refers to the development of similar traits or characteristics in closely related but independent populations or species. They evolved independently in different groups, not because they share a recent common ancestor, but because they are exposed to similar environmental pressures. Unrelated species evolving similarities (option A) is convergent evolution, and unrelated species with characteristics that are dependent on one another (option C) is coevolution. Identical vestigial organs in related species (option D) may be a result of a common ancestor with the organ, but it would not be parallel evolution. Lastly, option E is not entirely correct as it focuses on different adaptations rather than similar traits evolving independently.

Parallel Evolution Occurs When