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20 Cards in this Set
- Front
- Back
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Hormone |
A substance that is produced in one part of an organism |
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Target cell |
Portion of an organism affected by particular hormone |
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Phototropism |
The tendency of a plant to grow toward a source of light |
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Auxins |
Produced in the apical meristem and are transported downward into the rest of the plant |
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Gravitropism |
Which is the response of a plant to the force of gravity |
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Lateral bud |
A merstematic area in the side of a stem that gives rise to side branches |
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Apical dominance |
Closer a bud is to the stems tip, the more it is inhibited |
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Herbicides |
High concentrations of auxins inhibit growth, many compounds are used as |
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Cytokinins |
Plant hormones that are produced in growing roots and in developing fruits and seeds |
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Gibberellin |
Fungus produces a growth promoting substance like this |
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Ethylene |
One od the minor components of natural gas |
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Tropisms |
Responses of plants to external stimuli |
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Thigmotropism |
Response of plants to touch |
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Short day plants |
Plant flowers when days are short |
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Long day plants |
Plant flower when days are long |
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Photoperiodism |
Responsible for the timing of seasonal activites such as flowering and growth |
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Dormancy |
Period during which an organisms growth stops |
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Abscission |
Cells at the petiole seals the leaf off from the plants vascular system |
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Xerophytes |
Plants that live in the desert biome |
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Epiphytes |
Plants that are not rooted in soil but instead grow directly on the bodies of other plants |
