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Nastic Movement
Movement in a plant caused by changes in turgor preasure.
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Pore Psaces
Spaces in the soil which determine how much water and air the soil contains.
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Loam
A mixture of gravel, sand, silt, and clay.
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Cohension
The phenomoenon that occurs when individual molecules are so strongly attracted to each other that they tend to stay together, even when exposed to tension.
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Translocation
The process by which organic substances move down the phloem of a plant.
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Hormones
Chemicals that affect the rate of cellular reproduction and the development of cells.
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Phototropism
A growth response to light.
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Gravotropism
A growth response to gravity.
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Thigmotropism
A growth response to touch.
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Perfect flowers
Flowers with both stamens and carpels.
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Imperfect flowers
Flowers with eather stamens or carpels, but not both.
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Pollination
The transfer of pollen grains from the anther to the carpel in flowering plants.
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Seed
An ovule with a protective coating, encasing a mature plant embryo and a nutrient source.
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Fruit
A mature ovary which contains a seed or seeds.
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