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3.5

8th period

TermDefinition
Tropism The response of a plant towards or away from stimulus
hormone A chemical that affects the growth and development chemical production of an endocrine gland
photoperiodism A plant response to a seasonal change in the length of night and day
critical night length The number of hours that determines whether the plant or not or flower
dormancy A period of time when an organism growth actively stops
List three stimulus that produce plant responses Touch gravity and light
give an example about positive and negative tropisms Positive is towards light negative is away from light
describe what triggers a plant to flower auxin causes a plant to flower
why is dormancy important Help plants survive in a lack of temperature, the lack of water
Created by: user-1996762
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