Question

8 multiple choice 1 point homologous structures indicate: common function, no ancestry common ancestry, different functions random mutations identical genes

Explanation:

Homologous structures are anatomical features in different organisms that have a similar underlying structure (indicating common ancestry) but may have different functions. For example, the forelimbs of humans (used for grasping), bats (used for flying), and whales (used for swimming) have a similar bone - structure, showing common ancestry but different functions. Option A is incorrect because homologous structures do not have a common function (analogous structures do). Option C (random mutations) is not related to the concept of homologous structures. Option D is wrong as homologous structures do not imply identical genes, just a common evolutionary origin.

Answer:

B. Common ancestry, different functions