50719
Descrição
Mapa Mental por lauren_morris, atualizado more than 1 year ago
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Criado por lauren_morris
mais de 11 anos atrás
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Evolution
- Theories
- Darwin's
- Based on Natural Selection
- Individuals compete for resources
- Those with characteristics best suited survive
- These individuals reproduce to
produce more well-suited individuals
- These individuals reproduce to
produce more well-suited individuals
- Random mutations cause variation in
the species
- This idea was found after
Darwin's time
- It was the evidence he needed
- It was the evidence he needed
- This idea was found after
Darwin's time
- Those with characteristics best suited survive
- People objected at first
- Theory goes against story
of creation
- Not enough evidence
- No evidence of
inheritance or variation
- Theory goes against story
of creation
- Based on Natural Selection
- Lamarck's
- If characteristic used a lot, that
would improve over generations
- If characteristic not used a lot,
eventually disappear
- Usually dismissed today
- Species would become more complex
- There are still simple organisms around today
- There are still simple organisms around today
- Species would become more complex
- If characteristic used a lot, that
would improve over generations
- Darwin's is most trusted today
- Darwin's
- Example
- The Peppered Moth
- Random mutation caused
variation - some dark,
some light
- Tree surfaces are dark due to pollution
- Dark moth less likely to be seen and eaten
- Dark moths survive and breed
- Dark characteristics repeated over
generations
- Dark characteristics repeated over
generations
- Dark moths survive and breed
- Dark moth less likely to be seen and eaten
- Tree surfaces are dark due to pollution
- Random mutation caused
variation - some dark,
some light
- The Peppered Moth
- Classification
- Organisation of living things
according to their similarities
- E.g. Animal and Plant Kingdoms
- Smallest - species
- Smallest - species
- Organisation of living things
according to their similarities
- Rapid Mutation of TB
- 1. TB infects someone. The variation in the
TB due to random gene mutations means
that some bacteria are resistant to
antibiotics
- 2. After a course of antibiotics, all bacteria are killed except the
resistant ones. This is through survival of the fittest and is Natural Selection
- 3. These reproduce, passing on the resistant
gene, keeping the patient ill
- 4. So, a new drug has to be found
that they are not resistant to.
- 1. TB infects someone. The variation in the
TB due to random gene mutations means
that some bacteria are resistant to
antibiotics
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