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16 Cards in this Set
- Front
- Back
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physiology
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the study of life processes in an organism
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nastic movement
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a plant's response to a stimulus such that the directions of the response is preprogrammed and not dependent of the direciton of the stimulus
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pore spaces
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spaces in the soil that determine how much water and air the soil can hold
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loam
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a mixture of gravel, sand, silt, clay, and organic matter
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cohesion
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the phenomenon 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
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the process by which organic substances move through the phloem of a plant
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hormones
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chemicals that circulate throughout multicellular organisms, regulating cellular processes by interacting with specifically targeted cells
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phototropism
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a growth response to light
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gravitropism
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a growth response to gravity
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thigmotropism
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a growth response to touch
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perfect flowers
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flowers with both stamens and carpels
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imperfect flowers
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flowers with either stamens or carpels, but not both
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pollination
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the transfer of pollen grains from the anther to the carpel in flowering plants
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double fertilization
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a fertilization process that requires two sperm to fuse with two other cells
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seed
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an ovule with a protective coating, encasing a mature plant embryo and a nutrient source
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fruit
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a mature ovary that contains a seed or seeds
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