Work Step by Step
Homologous structures come from a structure in a common ancestor, not just similar-looking ones (B.). How they function (C., D.,) does not affect their being homologous.
You can help us out by revising, improving and updating this answer.Update this answer
After you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.