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stuart burns

ch3L5 notcards

TermDefinition
tropism a plants growth response Toward or away from a stimulus
Hormone 1. a chemical that affects growth and development 2. The chemical product of an endocrine gland
Photoperiodism A plants response to seasonal changes in the length of night and night
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 organism's growth or activity stops
list three stimuli that produce plant responses touch, gravity, and light
Give an example of both positive and negative tropism. If it grows towards stimulus it’s positive. It grows away. It’s negative.
describe what triggers a plant to flower The critical might length
Why dormancy is important helps plants survive freezing temperatures and lack of liquid water
Created by: user-1996505
 

 



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