Homology means

Explanation

The correct answer is Option D: Homology is the study of similar organs or structures that arise from a common evolutionary ancestor, even if they have diverged to perform different functions. For instance, the forelimbs of humans, wings of birds, and flippers of whales are homologous structures. They share a common skeletal structure but have evolved to serve different functions. Option A is incorrect as it does not address the concept of homology. Option B is incorrect because it describes analogy, where features are similar due to convergent evolution rather than common ancestry. Option C is incorrect as it also describes analogy, focusing on functional similarity rather than structural similarity due to common descent.