Theory of Evolution

Theory of Evolution

Evolution is the process by which the characteristics of living organisms are brought about by means of adaptation through natural selection. This is one of the most amazing scientific insights ever made.

It explains not only the origins of life on Earth but also how the incredible diversity of life came into existence. It was Charles Darwin who proposed this theory in his book "On the Origin of the Species" (Darwin, 1859). This is how it works:

Variation: Individuals within a species differ from one another, maybe in shape, biological function or behaviour.

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Inheritance: Some of this variation is passed to the individuals from their parents.

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Competition: Individuals do not produce as many offspring as they could because population sizes tend to stay fairly constant, so they must be competing with each other.

Natural selection: Competition leads to those individuals with the best characteristics producing the most offspring, thereby passing on those good features to the next generation (survival of the 'fittest').

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Adaptation: Organisms become adapted to their environment because those individuals selected will be those best able to do things like find food, attract mates and avoid predators.

Place the numbers next to the corresponding text to show the correct order of events and then mark your answer:

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