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Chapter 5

QuestionAnswer
Tropism The response of a plant toward or away from a stimulus
Hormone A chemical that affects growth and development
Auxin A plant hormone that speeds up the rate at which a plant's response to light
Photoperiodism A plant's 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
Short-day plant A plant that flowers when the nights are longer than the plant's critical night length
Long-day plant A plant that flowers when the nights are shorter than the plant's critical night length
Day-neutral plant A plant with a flowering cycle that is not sensitive to periods of light and dark
Dormancy A period of time when organism's growth or activity stops
Created by: FDMcCormick