Why did Byzantine emperor ask pope urban ll for help

According to darwin’s theory of evolution, how are the finches that live on the galapagos islands similar to members of a family tree? all of the finches share similar traits. all of the finches share common ancestors. all of the finches are able to reproduce. all of the finches are adapted to survive the same conditions.

How did conservatism affect the nationalist movements in europe?

What are the strengths of the byzantine empire?