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4.1.2 OUTLINE THE MECHANISM OF NATURAL SELECTION AS A POSSIBLE DRIVING FORCE FOR SPECIATION : the process where individuals best suited to their environment survive and go on to reproduce so successful genes are passed on to the next generation. : a process by which new species are formed by successful genes being passed on to the next generation, changing the gene pool and ultimately leading to a new species. : a group of organisms that can interbreed and produce fertile offspring. : the development of new species over very long periods of geological time. Evolution Natural selection Speciation A species The theory of evolution was suggested by … He noted that: All species tend to … –produce. This means there is … for resources and a struggle for … . Species show … , and so he concluded that those best adapted to their environment … and these can then go on to . Successful genes are therefore … This is called natural selection. Over time changes in the species’ gene pool leads to … Artificial selection is selective breeding – this is when humans choose animals to breed together because of their… Darwin’s theory is often called ‘survival of the fittest’. Why? Finches adapted to their individual island environments by … Tortoises with long necks were more successful because…. This meant that on some Galapagos Islands tortoise shells Lizards that learnt to swim were more successful because Species and Speciation • Interbreed and produce fertile offspring • New species produced (cc) Image from Flickr by Andion 4.1.2 OUTLINE THE MECHANISM OF NATURAL SELECTION AS A POSSIBLE DRIVING FORCE FOR SPECIATION