Evolution

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1. What do evolutionary trees show?

  • Types of organisms and relationships between them.
  • Common ancestors and relationships between organisms. The more recent the common an
  • Whether there are any common ancestors.
  • How trees evolved over 3 Billion years.
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2. Why didn't everyone agree with Darwin?

  • Because it was against common religious beliefs, Lamarck couldn't explain himself, There wasn't enough evidence.
  • Because it was against common religious beliefs, Darwin couldn't explain himself, There wasn't enough evidence.
  • Because it was against ancestral beliefs, Darwin couldn't explain himself, There wasn't enough evidence.
  • Because it was against common religious beliefs, Darwin couldn't prove with an experiment, There wasn't enough data/information

3. 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.

4. Describe how evolution can occur due to mutations.

  • MRSA is an example. A mutation which has accumulated in a population.
  • A mutation is a change in an organisms DNA, occasionally they can be beneficial by producing a useful characteristic. this characteristic may give the organism a better chance of surviving and reproducing.
  • A mutation is a broken DNA, occasionally they can be beneficial by producing a useful characteristic. this characteristic may give the organism a better chance of surviving and reproducing.

5. 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.

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