P1.7.2 Accepting Darwin's ideas + P1.7.3 Natural Selection + P1.7.4 Classification and Evolution

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  • Created by: Maddi
  • Created on: 04-05-14 23:38
Why were Darwin's theories only gradually accepted?
They challenged the idea that God made all the plants and animals. Scientists were not convinced because there was not sufficient evidence.
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How does natural selection work?
?
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What is a mutation?
A change in the genetic material of an organism.
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Why do organisms show a wide range of variation?
Variation is due to to differences in their genes.
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Why are mutated genes sometimes an advantage?
If the environment changes the gene may control a characteristics which makes the organism better adapted to the conditions.
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What is classification?
Organisms which are best adapted to the environment survive, breed and pass on their genes to the next generation.
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How does classification help us understand evolution?
Classification helps us to understand evolutionary and ecological relationships.
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What is the natural classification system?
Classification system based on the similarites between different living organisms.
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What are the main kingdoms of living organisms?
Animals, Plants and Microorganisms.
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Why is it useful to draw evolutionary trees?
They show the relationships between organisms.
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What is meant by the term 'survival of the fittest'?
Those that are best adapted or suited to their environment live long enough to breed. The weaker ones will die before they breed.
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Other cards in this set

Card 2

Front

How does natural selection work?

Back

?

Card 3

Front

What is a mutation?

Back

Preview of the front of card 3

Card 4

Front

Why do organisms show a wide range of variation?

Back

Preview of the front of card 4

Card 5

Front

Why are mutated genes sometimes an advantage?

Back

Preview of the front of card 5
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