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What were Darwin’s theories?

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What were Darwin’s theories?

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In the science of biology, evolution is the process by which living things change from one generation to the next. Parents pass on their genes to their offspring, but these genes can change in two ways. The first of these ways, Darwin realised, is natural selection. This is what happens when some individual creatures have features which make it more likely for them to survive than those which do not have these features. For example, if an animal species feeds on vegetation that grows high in trees, and this becomes scarce, then they may have to feed from higher branches than they did before. As a consequence, those animals with longer necks will be better able to feed, survive and breed than those with shorter necks – so, the creatures with shorter necks will die, will not pass on their genes and the species as a whole will tend to have longer necks. The second way that genes can change is by mutation. This can produce new or altered traits in individuals, which may be favourable or un

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