Biology · Evolution

Anatomically, the human arm, the flippers of seals, and the wings of the birds are the forelimbs containing similar bones. These forelimbs have a common origin and similar anatomical features but have been modified to perform different functions. Flippers allow the seal to swim, birds fly using their wings and humans perform a variety of functions using the arms. Such structures are homologous to each other.

This option is partially correct. The human arm is homologous with the seal's flipper due to their common evolutionary origin and similar bone structures.

This option is incorrect. Octopus tentacles are not homologous to human arms as they do not share a common evolutionary origin or similar structure.

This option is partially correct. The human arm is homologous with the bird's wing because they share a common evolutionary ancestor and similar bone structures.

This option is correct. Both the seal's flipper and the bird's wing are homologous to the human arm, sharing a common evolutionary origin and similar anatomical structures, despite serving different functions.