Which type of evolution is described as two species that start out different and evolve to share similar traits?

Which type of evolution is described as two species that start out different and evolve to share similar traits?

• A. Convergent
• B. Divergent
• C. Parallel
• D. Stabilizing

Answer: (A)

Convergent evolution is when two species that start out different evolve to share similar traits. This happens because they face similar environments or ecological roles, so natural selection pushes them toward the same solutions even though their lineages are not closely related. For example, dolphins and sharks both have streamlined bodies for efficient swimming, even though one is a mammal and the other a fish. Similarly, wings in bats and birds developed independently to enable flight. The idea is that similar pressures produce analogous features, not because the species share a recent common ancestor. Divergent evolution describes related species becoming more different as they adapt to different environments, which is the opposite pattern. Stabilizing selection tends to favor average traits and does not explain two distant lineages evolving similar features. Parallel evolution involves related species in similar environments evolving similar traits along similar paths, which is close but still distinct from convergent evolution since their starting points are more closely related.

Convergent evolution is when two species that start out different evolve to share similar traits. This happens because they face similar environments or ecological roles, so natural selection pushes them toward the same solutions even though their lineages are not closely related. For example, dolphins and sharks both have streamlined bodies for efficient swimming, even though one is a mammal and the other a fish. Similarly, wings in bats and birds developed independently to enable flight. The idea is that similar pressures produce analogous features, not because the species share a recent common ancestor.

Divergent evolution describes related species becoming more different as they adapt to different environments, which is the opposite pattern. Stabilizing selection tends to favor average traits and does not explain two distant lineages evolving similar features. Parallel evolution involves related species in similar environments evolving similar traits along similar paths, which is close but still distinct from convergent evolution since their starting points are more closely related.