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Plant responses and

Ch 3 L 5

TermDefinition
Tropism A plant’s growth response toward or away from a stimulus
Hormone A chemical that effects how the plant grows and develops
Photoperidism A plant’s response to seasonal changes in the length of day and night
Critical night length The number of hours of darkness that determines weather a plant will flower or not
Dormancy A period of time when an organism’s growth stops or pauses
3 stimuli that produce plant responses Touch, gravity, and light
An example of positive and negative tropism Negative: when the plant grows away from the stimulus Positive: when the plant grows toward the stimulus
What triggers a plant to flower The amount of darkness around the plant
Created by: user-1915739
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