| Term | Definition |
|---|
| Macronutrient | one of 9 essential elements for a plant |
| Micronutrient | elements that are needed in trace amounts |
| Soil | minerals mixed with humus |
| Humus | decomposing organic material |
| Loam | same proportion of silt, sand, clay and humus; best soil |
| Root Nodules | swellings on roots; contain nitrogen-fixing bacteria |
| Transpiration | evaporation of water from plant parts |
| Water Actually Used in Plant | 2% |
| Water that Transpires | at least 90% |
| Cohesion-Tension Theory | Negative tension of transpiration in xylem pulls water up |
| Hydrogen Bonds | make water cohesive |
| Cuticle | waxy covering of epidermis; restricts water loss |
| Translocation | moving of sugars through phloem of a plant |
| Source | where food is made |
| Sink | region where compounds are being used or stored |
| Pressure-Flow Theory | Water, by osmosis, creates pressure along with the sucrose already in the phloem and pushed solution toward sink |
| Clay | holds dissolved mineral ions and water molecules |
| Mycorrhizae | symbiotic relationship between a young root and a fungus |
Combine with other sets
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