The Theory of Natural Selection

Gap-fill exercise

Organisms produce large numbers of - some of these will not live long enough to themselves.
In any species there is between the individuals.
Organisms with the useful are more likely to survive and pass them on to the next .

For example - Galapagas Finches
Darwin studied the finches on the Galapagos Islands. He noticed that finches had different - some for eating seeds and some for eating .
Darwin suggested that the seed-eating finches has reached the isalnds from the mainland, but there was not enough for all the finches. Finches with slightly different beaks were able to eat other of food.
They were able to and passed on their adaptations to their .