Development of similar adaptive functional structural features in an unrelated group of organisms is called:

Define and explain the concepts of Homology and Adaptive radiation (divergent evolution).

$A$: Placental wolf and Tasmanian wolf (a marsupial) show convergent evolution.
$R$: Like marsupials,placental mammals in other parts of the world also exhibit adaptive radiation in evolving into varieties of such placental mammals,each of which appears to be similar to a corresponding marsupial.

Darwin's finches provide an excellent example in the context of evolution. From which field did this evidence come?

Give an example where more than one adaptive radiation has occurred in an isolated geographic area. Name the type of evolution your example depicts and state why it is so named.

On which island did Darwin observe many varieties of finches?