Module B3

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  • Created by: Teodora
  • Created on: 30-04-12 12:54

Darwin's theory

Charles Darwin was an English naturalist who studied variation in plants and animals during a five-year voyage around the world in the 19th century.

 

Because back in the 1800's everything was ruled by the church,Darwin's ideas caused a lot of controversy because they can be seen as conflicting with religious views  about the creation of the world and the creatures in it

Natural Selection:

  • individuals in a species show a wide range of variation
  • this variation is because of differences in their genes
  • individuals with characteristics most suited to the environment are more likely to survive and reproduce
  • the genes that allow these individuals to be successful are passed to their offspring.

Individuals that are poorly adapted to their environment are less likely to survive and reproduce. This means that their genes are less likely to be passed to the next generation. Given enough time, a species will gradually evolve.

  • variation can be caused by both genes and the environment. But it is only variation caused by genes that can be passed on to the next generation.

Selective Breeding:

Natural selection and selective breeding can both produce changes

Comments

Teodora

Hope this helps guys! :)

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