In the Cape Verde Island Darwin devised his theory of coral reefs. Another significant stop on the trip was in the Galapagos Islands, it was here that Darwin found huge populations of tortoises and he found that different islands were home to significantly different types of tortoises. Darwin then found that on islands without tortoises, prickly pear cactus plants grew with their pads and fruits spread out over the ground...
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Darwin then found that on islands without tortoises, prickly pear cactus plants grew with their pads and fruits spread out over the ground. On islands that had hundreds of tortoises, the prickly pears grew substantially thick, tall trunks, bearing the pads and fruits high above the reach of the tough mouthed tortoises...
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Natural Selection However, the mechanisms of natural and artificial selection are essentially identical, and in fact the observed effects of artificial selection were used by Darwin to illustrate how natural selection works...	3 / 751
BIO HOMEWORK population- a group of organisms of the same species living together in a given region and capable of interbreeding. 3.gene pool- the total of all the alleles present in a population 4...	3 / 609
Natural Selection An organism develops a beneficial trait that enables the organism to survive easier. This trait is passed on the future generations because these decedents have a better chance of survival with this trait...	4 / 982
selection However, if the reason they grow tall is because of the soil in which their seeds happened to land, and not because they have the genes to grow tall, than no evolution will occur...	2 / 441