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3.5 Notecards

Period 8

TermDefinition
Tropism The response of a plant toward or away from the stimulus.
Hormone A chemical that affects 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 organism growth or activity stops.
The three stimuli that produce plant responses Touch gravity and light are three important similar that trigger growth responses or tropisms and plants.
Describe what triggers a plant to flower Photoperiodism
Why dormancy is important. if an organism is not in the right conditions to grow, it needs to stop.
Created by: user-1996764
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