Answer :
The bones possessed by the common ancestor of tetrapods in forelimbs were the humerus, radius, ulna, carpals, metacarpals, and phalanges.
When we compare anatomy and morphology, we find certain similarities and differences between the organisms that exist today and the organisms that existed several years ago.
Humans, bats, cheetahs, and whales all have the same origin as well as same basic structure of the skeleton but those structures have been modified due to the adaptation to the environment in which they live.
The forelimbs of whales are modified into flippers for swimming while the forelimbs of bats are modified into wings to facilitate their flight.
In the above case, the forelimbs are homologous organs.
Homologous organs are those organs that have a common origin but different functions.
They represent common ancestry.
Thus, the bones possessed by the common ancestor of tetrapods in forelimbs were humerus, radius, ulna, carpals, metacarpals, and phalanges.
To know more about "homologous and analogous organs", refer to the link given below:
https://brainly.com/question/14529788?referrer=searchResults
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