AQA GCSE Biology Unit 1 8.1 Evolution
- Created by: revisieacocobean
- Created on: 16-05-16 12:29
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- Evolution
- Dawin
- All species of living things have evolved from simple life forms that first developed more than 3 billion years ago
- Only gradually accepted because...
- Inheritance and variation was not known
- challenged the idea that God made life
- insufficient evidence
- Natural selection (evolution)
- (Competition for survival) Species show a wide range of variation because of differences in their genes
- individuals with characteristics most suited to the environment survive and reproduce
- A new species is created
- Better gene becomes more common in the population
- A new species is created
- new forms of a gene result from mutation leading to rapid changes in species if the are better adapted to that environment
- A new species is created
- Better gene becomes more common in the population
- A new species is created
- individuals with characteristics most suited to the environment survive and reproduce
- (Competition for survival) Species show a wide range of variation because of differences in their genes
- Only gradually accepted because...
- Evidence
- Only a small proportion of off spring produced survive
- species e.g dogs, pigeons, can be changed over time through selection by humans
- All species of living things have evolved from simple life forms that first developed more than 3 billion years ago
- Lamarck
- Changes occur in an organisms lifetime and can be inherited
- 'Giraffes were orginally short necked. But they lept stretching their neck to rech the leaves. They keep stretching until the neck becomes progressively longer
- Dawin
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