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7th Plant Systems
Term | Definition |
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External stimulus | a change in the environment outside of the organism |
Feedback mechanism | a response within a system that influences the activity of that system |
Force | a push or pull that can change the position or motion of an object / material |
Geotropism (gravitropism) | growth that happens in organisms in response to gravity, such as the downward growth of plant roots |
Homeostasis | the body’s ability to keep the internal balance of the body stable |
nternal stimulus | a change within the organism |
Motion | a change in the position of an object |
Phloem | conducting tissue in plants that transports nutrients through the plant |
Phototropism | growth that happens in organisms in response to light, such as a stem bending toward a light source |
Root system | below-ground part of a plant that includes the organs such as roots, tubers, and rhizomes |
Shoot system | above-ground part of a plant that includes the organs such as leaves, buds, stems, flowers (if the plant has any), and fruits (if the plant has any) |
Stable | balanced; unchanging |
Stimulus | a thing or event that causes a response or reaction |
Transpiration | process of water moving through plants and evaporating from the leaves and stems into the atmosphere |
Tropism | turning of all or part of an organism in a particular direction in response to an external stimulus |
Turgor pressure | pressure exerted by water inside the cell on the cell wall |
Xylem | vascular tissue in plants that transports fluid through the plant |