Survival and Response 0.0 / 5 ? BiologySurvival and ResponseA2/A-levelAQA Created by: Lindsay SimmonsCreated on: 07-01-17 14:24 Definition of a stimulus a detectable change in the internal or external environment 1 of 7 Definition of a receptor detect stimuli. Receptors are specific to stimuli 2 of 7 Definition of effector Produce a response 3 of 7 Definition of plant growth factor plant responses to external stimuli 4 of 7 Definition of tropisms directional growth of a plant in response to a directional stimulus 5 of 7 Definition of taxis a directional locomotory response 6 of 7 Definition of kinesis a response involving random movement/ a changed level of activity 7 of 7
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