What does the presence of homologous structures in different organisms suggest?

common distribution

common ancestry

similar habitat

similar movement

The correct answer is option 2. Common ancestry.

Explanation:

The homologous structure is the structure that has a similar anatomical structure or underlying skeleton and can perform a different function in different organisms.

Homologous structures are similar in different organisms because they diverge from a common ancestor. All organisms that have homologous structures are considered to have a common ancestry. for example, human arm, dogs forearm, bat's wing all have a similar skeleton structure  

Thus, the correct answer is option 2. Common ancestry.

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c: warm water flows from the western tropical pacific toward south america. that should be the right answer! hope it .