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8.5 vocab
Science 8.5 voacabulary
Question | Answer |
---|---|
plants growth response towards or away from a stimulus | tropism |
chemical that affects how plant grows and develops | hormone |
speeds up the rate where a plants cells grow | auxin |
plants response to seasonal changes | photoperotism |
plant that flowers when the nights are longer | short-day plant |
plant that flowers when nights are shorter | long- day plant |
number of hours of darkness that determines if a plant will flower | critical night length |
plant with flowering cycle that isnt sensitive to periods of light and dark | day-nuetral plant |
period when an organisms growth or activity stops | dormancy |
flowering plant that completes it life cycle in 1 growing season | annual |
flowering plant that completes it life cycle in 2 years | biennial |
flowering plant that lives for more than 2 years | perennial |