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8.5

Science Vocab

TermDefinition
tropism a plant's growth response toward or away from a stimulus
hormone produced by a plant is a chemical that affects how the plant grows and develop
auxin speeds up the rate at which a plant's cell grow
photoperiodism a plant's response to seasonal changes in length of night and day
short-day plants flower when nights are longer than a critical length
long-day plants flower when nights are shorter than a critical length
critical night length the number of hours of darkness that determines whether or not sensitive to periods of light and dark
day-neutral plants their flowering cycle is not sensitive to periods of light and dark
dormancy a period when an organism's growth or activity stops
annulas flowering plants that complete a life cycle in within a growing season
biennials angiosperm that complete their life cycle in two years
perennials flowering plants that live for more than two years
Created by: Ben Rodriguez
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