Adaptive radiation

The role that an organism plays within a community

The evolution of a group of related organisms alond several different lines by adapting over a long period of time to a wide variety of environments

Mammals (placentals, marsupials and monotremes), cichlid fish, and Darwin's/Galapagos finches

This refers to any similarity between the structures of organisms that have the same evolutionary origin eg pentadactyl limb. These structures have arisin by divergent evolution

Structures that perform the same function but are structually different and have arisen fom different evolutionary origins. These structures have arisen by convergent evolution