Biology A-Level
selection pressure
What selection pressure means in Biology A-Level, as defined for AQA.
Definition of selection pressure
Check what you remember
Read the wording for your board, then hide it and explain selection pressure in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Any factor that makes some phenotypes more likely than others to survive and reproduce.
Topics that use selection pressure
- Evolution may lead to speciation (A-level only) (AQA A-Level)
Related terms
- allele frequency change
- allopatric speciation
- causes of change
- common ancestry
- competition for resources
- continuous variation
- crossing over
- directional selection
Using selection pressure in the exam
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