Question

question 8 of 20
complete the sentence. homologous structures are
small structures which appear to have no role due to the loss of their ancestral function.
different structures which do not share a common ancestry, despite their similarities in function.
similar structures which share a common ancestry, despite their differences in function.
different structures which do not share a common ancestry and have differences in function.

Explanation:

Homologous structures are defined as anatomical features in different organisms that have a similar underlying structure because they inherit it from a common ancestor, even if they now serve different functions (e.g., the forelimbs of humans, bats, and whales). The other options describe vestigial structures (first option), analogous structures (second option), or unrelated structures (fourth option).

Answer:

similar structures which share a common ancestry, despite their differences in function.