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What is an ecological niche?
The role that an organism plays within a community
What is adaptive radiaiton?
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
Give examples of animals that have come about through adaptive radiation
Mammals (placentals, marsupials and monotremes), cichlid fish, and Darwin's/Galapagos finches
What is homolgy?
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
What is analogy?
Structures that perform the same function but are structually different and have arisen fom
different evolutionary origins
. These structures have arisen by convergent evolution
Higher Biology - Unit Two - Adaptive radiation