Homologous Features

[ramin123]

I understand that thos who have homologous features share a common ancestor, but does it mean that the fnc of let say their arms have to be different?

And then also-- what does a common ancestor mean? How far back of an ancestor?

These q might be stupid to some but I really want to understand the concept clearly.

Thanks

---

Members don't see this ad.

 

[PreDent2009]

Yes, homologous features such as a human's arm and a bat's wing would come from common ancestry (mammals), and have different functions.

I understand that thos who have homologous features share a common ancestor, but does it mean that the fnc of let say their arms have to be different?

And then also-- what does a common ancestor mean? How far back of an ancestor?

These q might be stupid to some but I really want to understand the concept clearly.

Thanks

 

[DDSguyLA]

homologous have same ancestor background and they have the same basic feature but can be different in function...

i dont think we need to knwo how many years back...

prob millions, if i had to guess it would be 4,384,002 million years ago...
just my guess