Natural Selection

Includes information on Charles Darwin's theory of natural selection, modern examples of natural selection and arguments over natural selection.

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Who came up with the theory of natural selection?
Charles Darwin.
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How are adaptations passed on?
When organisms reproduce their genes are passed onto their offspring.
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Summarise natural selection.
Within a species there is variation, there is competition among the species, only the best adapted survive. Those that survive pass on successful adaptations to their offspring in their genes.
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How can natural selection result in a new species?
If members of the species cannot mate for a long time.
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What may cause members of a species not to mate?
Geographical or behavioural isolation due to adaptations.
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How do peppered moths use natural selection to survive?
Some are dark and some are light. The dark ones can camouflage better and so have a better chance of survival.
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Why did people disagree with Darwin's theory?
Some thought that he didn't have enough evidence and others believed that God had created all species.
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Why is Darwin's theory now more widely accepted?
It is more widely accepted now because it explains many observations and it has been discussed/tested by a wide range of scientists.
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What was Lamarck's theory?
Lamarck theorised that organisms acquired desired characteristics during their lifetimes and passed them onto their young.
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How has Lamarck's theory been proved incorrect?
Scientists have discovered how genes are passed on which has disproved Lamarck's theory.
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Other cards in this set

Card 2

Front

How are adaptations passed on?

Back

When organisms reproduce their genes are passed onto their offspring.

Card 3

Front

Summarise natural selection.

Back

Preview of the front of card 3

Card 4

Front

How can natural selection result in a new species?

Back

Preview of the front of card 4

Card 5

Front

What may cause members of a species not to mate?

Back

Preview of the front of card 5
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