Convergent evolution in mammals is best described as?

• A. Independent evolution of analogous traits in related lineages due to different pressures.
• B. Independent evolution of similar traits in unrelated lineages due to similar selection pressures; example: convergent fossorial forms seen in marsupial and placental moles.
• C. Convergent evolution refers to traits that arise from shared ancestry and identical environments.
• D. A population becoming extinct and re-evolving features later.

Answer: (B)

Convergent evolution is about independent development of similar features in different mammal lineages that aren’t closely related, driven by similar environmental pressures. When species face the same challenges—like living a burrowing, underground life—natural selection nudges them toward similar solutions, even if their ancestors diverged long ago. The fossorial forms of marsupial moles and placental moles are a classic illustration: both end up with stout bodies, broad digging forelimbs, and streamlined snouts, not because they share a recent ancestor, but because digging efficiently is the same problem and the same kind of body plan works well.

So the best description is that similar traits arise independently in unrelated groups due to similar selection pressures, producing features that are analogous rather than inherited from a common ancestor.