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16 Cards in this Set
- Front
- Back
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Physiology |
The study of life processes in an organism |
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Nastic movement |
A plant's response to a stimulus such that the direction of the response is preprogrammed and not dependent on the direction of the stimulus |
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Pore spaces |
Spaces in the soil which determine how much water and air the soil can hold |
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Loam |
A mixture of gravel, sand, silt, clay, and organic matter |
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Cohesion |
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 |
The process by which organic substances move through the phloem of a plant |
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Hormones |
Chemicals that circulate throughout multicellular organisms, regulating cellular processes by interacting with specifically targeted cells |
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Phototropism |
A growth response to light |
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Gravitropism |
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 either 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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Double fertilization |
A fertilization process that requires two sperm to fuse with two other cells |
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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 that contains a seed or seeds |
