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8.5 science

TermDefinition
Tropism a plant's growth response toward or away from a stimulus
Hormone chemical that effects how a plant grows and develops
Auxin an important plant hormone
Photoperiodism a plant's response to seasonal changes in night and day
Short-day Plants flower when nights are longer than critical length
Long-day Plants flower when nights are shorter than critical length
Critical Night Length the number of hours of darkness that determines whether or not a plant will flower
Day-neutral Plants flowering cycle is not 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 in one growing season
Biennials angiosperms that complete their life cycle in two years
Perennials flowering plants that live for more than two years
Created by: s730044