How are the wings of bats and birds classified in terms of evolution?

Wings of bats and birds are classified as analogous structures because they evolved independently in different lineages to serve the same function, which is flight. This is an example of convergent evolution, where unrelated species develop similar traits due to similar selective pressures in their environments.

In contrast, the forelimbs of bats and birds are considered homologous structures. This means that they share a common ancestral origin, despite their different functions and forms. The forelimbs of both species have a similar underlying bone structure, reflecting their descent from a common ancestor.

Therefore, the correct answer conveys that while the wings represent a case of analogous evolution due to their independent origin and adaptation for flight, the forelimbs show homology, reflecting a shared ancestry despite their adaptation to different functions.