Evolution

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1. Describe the theory of natural selection.

  • The habitat in which a species lives in determines how succesful breeding will be within the species.
  • Genes that are responsible for the useful characteristics are more likely to be passed on to the next generation.
  • Individuals within a species show variation because of the differences in their genes. Individuals with characteristics that make them better adapted are more likely to survive and breed succesfully.
  • Individuals within a species show variation because of evolution of the species.
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2. Why do species with similar characteristics often have similar genes?

  • Because they share a recent common ancestor, so they're closely related.
  • Because they all come from the same father/mother figure
  • Because they have mutations with their bacterium.

3. How did the discovery of genetics support Darwin's idea.

  • Religion finally corresponded with the idea.
  • Showed how genetic mutation can result in natural selection.
  • It provided an explanation of how organisms born with beneficial characteristics can pass them on.
  • The idea of MRSA suggested that evolution can occur due to mutations.

4. What was Lamarck's theory? Why wasn't it accepted?

  • That if a characteristic was used a lot by an organism, it would become more developed during it's lifetime e.g rabbit's legs. He believed these characteristics would be passed on to the next generation. But experiments didn't support it.
  • Although experiments supported Lamarck's theory that characteristics developed during an organisms' lifetime, religion didn't support the idea.
  • If a characteristic was used a lot by an organism, it would be passed onto the next generation.

5. What do evolutionary trees show?

  • Whether there are any common ancestors.
  • Common ancestors and relationships between organisms. The more recent the common an
  • How trees evolved over 3 Billion years.
  • Types of organisms and relationships between them.

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