Biology A-Level
Natural selection mechanisms
What Natural selection mechanisms means in Biology A-Level, as defined for AQA.
Definition of Natural selection mechanisms
Check what you remember
Read the wording for your board, then hide it and explain Natural selection mechanisms in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
Random mutation creates variation, a specific selection pressure acts on the population, individuals with advantageous alleles experience differential survival and reproduction, and the advantageous allele frequency increases.
Topics that use Natural selection mechanisms
- Genetic diversity and adaptation (AQA A-Level)
Related terms
- advantage depends on environment
- allele
- allele passed to offspring
- altered tertiary structure
- aseptic technique
- bacterial lawn
- controls and control variables
- Data interpretation and evaluation
Using Natural selection mechanisms in the exam
Check the command word and mark scheme for your exact question. After comparing your explanation with the reference, use the term in an answer on the linked topic. This practice does not predict an exam mark.
Practise Biology questions
Create a free account to answer exam-style questions on this topic and get feedback on your answers.
Start free
All Biology A-Level termsA week of Premium from your first lesson · Then the free plan continues · No card, no charge