3.6 MUTATIONS
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Mutation
A random change in a DNA sequence that can make an organism advantageous or disadvantagous to survival
Adaptation
An adaptation is an inherited characteristic that makes an organism well suited to survival in its environment/niche.
Speciation
Speciation is the evolution of new species.
Factors that increase the rate of mutation
Radiation Some chemicals
Alleles
makes plants and animals better adapted to their environment
Variation
Makes it possible for an organism to evolve over time in response to changing environmental conditions
Natural selection
The best adapted individuals in a population survive to reproduce passing on the favourable allele that has the selective advantage
Isolation barriers
Geographical ● Ecological ● Behavioural