Variation & Evolution (AQA GCSE Biology Combined Science): Flashcards
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Evolution
Evolution
Change in inherited characteristics of population over time
Population (biology)
Population (biology)
All individuals of one species in same place at same time
Variation
Variation
Differences between individuals in a population
Can genetic causes of variation change?
Can genetic causes of variation change?
No, cannot change these characteristics
Can environmental causes of variation change?
Can environmental causes of variation change?
Yes, can change during lifetime
Most variation is caused by...
Most variation is caused by...
Combination of genes and environment
In natural selection, well-suited individuals are...
In natural selection, well-suited individuals are...
More likely to survive and reproduce
Mutations
Mutations
Random changes in genes
Source of all genetic variation in populations
Source of all genetic variation in populations
Mutations
When do two populations become separate species?
When do two populations become separate species?
When they cannot breed to produce fertile offspring