Biology A-Level
stimulus
What stimulus means in Biology A-Level, as defined for AQA.
Definition of stimulus
Check what you remember
Read the wording for your board, then hide it and explain stimulus in your own words. Rough notes are fine. This is a self-check, with no mark or grade.
Reference: AQA
A detectable change in the internal or external environment.
Topics that use stimulus
- Survival and response (A-level only) (AQA A-Level)
Related terms
- Chi-squared (χ²) test
- Controlled variables
- favourable environment
- independent and dependent variables
- indoleacetic acid
- meristems
- phototropism and gravitropism
- plant growth factors
Using stimulus in the exam
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