term 2
- Created by: charlotte
- Created on: 25-02-13 18:21
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- lesson 2
- key terms
- natural selection
- natural selection is one of the basic mechanisms of evolution.
- stage 1. there is variation in traits
- stage 2. there is differential reproduction
- stage 3. there is heredity
- stage 4. end results
- stage 3. there is heredity
- stage 2. there is differential reproduction
- genetic variation
- intraspecific
- individuals
- interspecific
- competition amongst other species
- adaptive radiation
- the emergence of a new species from a common ancestor introduced into a new environment
- species
- a species is a class of individuals having some common characterises or qualitys
- its difficult to define a species because all living things are different
- a species is a class of individuals having some common characterises or qualitys
- natural selection
- mechanism for evolution
- there is variation within a population and organisms can potentially over produce
- selection pressures (availability of food) increases competition and give advange to species with specific features
- the best adaptions survive and reproduce, passing on the alleles giving them a survival of the fittest
- over time the allele frequency in the population change
- the best adaptions survive and reproduce, passing on the alleles giving them a survival of the fittest
- selection pressures (availability of food) increases competition and give advange to species with specific features
- there is variation within a population and organisms can potentially over produce
- key terms
- natural selection is one of the basic mechanisms of evolution.
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