When Darwin was observing the Galapagos finches he noticed that there was a different kind on each island. The biggest difference was in their beaks. Darwin concluded that the birds had evolved and the form of their beaks had changed because the available food was harder on some islands and less hard on others. Now we know of course that the alteration was possible due to mutations. Hardness of the food is not a mutagenic material (it isn't a material at all) so mutations should be random. If we look from the mathematical perspective of randomness the same event should occur in multiple places after some time. In this case the same mutations should occur on different islands after some time. But if that were true then there wouldn't have been just one kind of finches on the island with the least hard food. Natural selection would take care of the finches with small beaks on islands with hard food but finches with strong beaks wouldn't have a problem with small seeds so if they had ever existed on such island they would have survived. But Darwin never saw a finch with a big beak on an island full of small seeds. If my facts are wrong please tell me where I made a mistake otherwise can someone please explain to me how is this possible?
put on hold as unclear what you're asking by Remi.b, David, James, theforestecologist, AliceD♦ 20 hours ago
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, it’s hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.