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8.5 terms

tropism a plant's growth response toward or away from a stimulus
hormone produced by a plant; a chemical that affects how the plant grows and develops
auxin speeds up the rate at which a plant's cells grow
photoperiodism a plant's response to seasonal changes in length of night and day
short-day plant flower when nights are longer than a critical length
long-day plant flower when nights are shorter than a critical length
critical night length the number of hours of darkness that determines whether or not a plant will flower
day-neutral plants not sensitive to periods of light and dark
dormancy a period when an organisms growth or activity stops
annual flowering plants that complete a life cycle within one growing season
bennial angiosperms that complete their life cycle in two years
perennial flowering plants that live for more than two years
Created by: S732526