GACS lclab Science 7 - Final Exam Review - Quiz 9: Chapter 5, Section 4 - From Bacteria to Plants
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lclabjrhigh on December 8, 2009
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GACS lclab Science 7 - Final Exam Review - Quiz 9: Chapter 5, Section 4 - From Bacteria to Plants
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22 terms
Terms | Definitions |
|---|---|
 biennials | during this groups first growing season, it germinates, grow roots, very short stems, and leaves. During its second growing season it produces flowers. |
| negative tropism | plant's stem and leaves growing upwards is an example of _______________. |
| photoperiodism | response of a plant to changes in the lengths of day and night due to the changes in the seasons |
| thigmotropism | a plant's response to touch stimulus |
| day-neutral plant | if the length of the nights and days does not determine the flowering cycle of a plant, then it is referred to as_______________. |
| length of their life cycle | used to classify angiosperms |
| annuals | most have herbaceous stems and complete their life cycle within one growing seasons |
| summer | time of year when long-day plants bloom |
| tropism | a plant's growth response toward or away from a stimulus |
| perennials | flowering plants that live for two or more growing seasons. |
| critical night length | number of hours of darkness that a plant must have in order to bloom |
| thigmo- | touch |
| photo- | light |
| auxin | speeds up the rate of plant growth |
| hormones | chemicals produced by a plant that control and affect plant growth and development |
| hours of darkness | determines whether or not a plant will flower |
| long-day plants | type of plants that flower when the nights are shorter |
| perennials | most of the plants in this group have woody stems that survive through the winter months |
| winter | time of year when short-day plants bloom |
| gravitropism | plant's response to the stimulus gravity |
| dormancy | period during the year when the activity of many plants stops |
| positive tropism | plant's movement in the direction of a stimulus |
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