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Coach Gibbs

Chapter 8.5 Vocab Terms

QuestionAnswer
Tropism A plant's growth response toward or away from a stimulus.
Hormone Affects how the plant grows and develops.
Auxin Important plant hormone that 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 Plants When the nights are longer than a critical length.
Long-Day Plant 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 Length Their flowering cycle isn't sensitive to periods of light and dark.
Dormancy A period when an organism's growth or activity stops.
Annuals Flowering plants that complete a life cycle within one growing season.
Biennails Angiosperms that complete their life cycle in two years.
Perennials Flowering plants that live for more than two years.
Created by: S732596
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