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Chapter 5
Question | Answer |
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Tropism | The response of a plant toward or away from a stimulus |
Hormone | A chemical that affects growth and development |
Auxin | A plant hormone that speeds up the rate at which a plant's response to light |
Photoperiodism | A plant's response to seasonal changes in the length of night and day |
Critical Night Length | The number of hours of darkness that determines whether or not a plant will flower |
Short-day plant | A plant that flowers when the nights are longer than the plant's critical night length |
Long-day plant | A plant that flowers when the nights are shorter than the plant's critical night length |
Day-neutral plant | A plant with a flowering cycle that is not sensitive to periods of light and dark |
Dormancy | A period of time when organism's growth or activity stops |