B1.8
- Created by: Meganallam
- Created on: 15-05-17 18:39
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- B1.8 Evolution
- Darwin's theory of evolution by natural selection states all living things have evolved from simple life forms that first developed more that 3 billion years ago.
- the theory wasn't always accepted because of three reasons.
- it challenged the idea that God made all the animals and plants.
- there was insufficient evidence.
- the mechanisms of inheritance and variation was not known until 50 years later.
- the theory wasn't always accepted because of three reasons.
- Lamarcks theory was based on the premise that changes that occur in an organism during its lifetime can be inherited .
- evolution occurs via natural selection
- individual organisms within a particular species may show a wide range of variation because of differences in their genes.
- individuals with characteristic most suited to the environment are more likely to survive and breed.
- the genes that have enabled these individuals to survive are then passed on to the next generation.
- where new forms of a gene result from mutation there may be relatively rapid change in a species if the environment changes.
- Darwin's theory of evolution by natural selection states all living things have evolved from simple life forms that first developed more that 3 billion years ago.
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