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Plant responses and
Term | Definition |
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Tropism | The response of a plant tword or away from a stimulis |
Hormone | A chemical that affects growth and develpment |
Auxin | A plant hormone that speeds up the rate at which a plant's cells grow and comtrols a plant's response to light |
Photoperiodim | A plant's response to seasonal changes in the length of night and day |
Critical night length | The number of hours of darkness the determins the determinds wheather or not a plant will flower |
Short-day plant | A plant that flowers when the nights are longer then the plant's critical night length |
Long-day plant | A plant the flowers when the nights are shoter then the plant's critical night length |
Day- nutral plant | A plant with a flowering cycle that is not sensitive to periods of light and dark |
Dormancy | A period of time when an organiosm's growth or activity stops |