Natural Selcetion

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  • Created by: Anjelala
  • Created on: 21-04-13 19:45
Who wrote the theory of natural selectino and what does it explain?
Charles Darwin wrote the theory of natural selction to explain how evolution might happen.
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Briefly explain what the natural selctions theory says...
It says if animals and plants are better adapted to their environment , they andd th following generations are more likely to survive.
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What did Charles Darwin not kow about adaptions that we know now?
When animals reproduce heir genes are passed on to the next generation.
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Briefly summerise the modern version of the natural selection.
> Within any species there is variation >Organisms produce more youngs than will survive so there's competition for resources >Only best adapted will survive (the survival of the fittest) >Those that survive pass on their adaptions in their genes.
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What may changes produced by natural selction result in?
New species.
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Why may change produced by natural selection result in new species?
1) If different groups of organisms can't mate for a long time. >If organisms can't mate because they live in difffernt areas ( geographical isolation)> If differnt groups evolve differently they may overtime be classed as a seperate species.
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WHyis natual selection difficult to study?
Because it normally takes tousands of years to see the effects.
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How are more and more bacteria changing?
More bacteria more bacteria are developing resistance to antibiotics.
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Why did people disagree with Darwin's theory?
>Some people thought he didn't have enough evidence >Some people thought God created all species.
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why is Darwin's theoy more accepted now?
> It explains a lot of observations >It has been discussed and tested by a wide range of scientists
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What was the name of the person who attempted to explain evoultion before Darwin?
Jean Lamarck.
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What was Lamarck's theory called?
The law of accquired characteristics.
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Summerise Lamarck's theory with an example...
The theory said that giraffes accquired long necks to feed so the characteristics was passed on.
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Other cards in this set

Card 2

Front

Briefly explain what the natural selctions theory says...

Back

It says if animals and plants are better adapted to their environment , they andd th following generations are more likely to survive.

Card 3

Front

What did Charles Darwin not kow about adaptions that we know now?

Back

Preview of the front of card 3

Card 4

Front

Briefly summerise the modern version of the natural selection.

Back

Preview of the front of card 4

Card 5

Front

What may changes produced by natural selction result in?

Back

Preview of the front of card 5
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