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responses and growth

ch3 L5

TermDefinition
tropism the response of a plant toward or away from a stimulus.
hormone a chemical that effects growth and development. The chemical product of an endocrine gland.
photoperiodism A plants response to seasonal changes in the length of night and day.
critical night length The number of hours of darkness that determines whether or not a plant will flower.
dormancy A period of time when an organisms growth or activity stops.
Created by: user-1915590
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