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Coach Gibbs
Chapter 8.5 Vocab Terms
Question | Answer |
---|---|
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. |