| A | B |
|---|
| Physiology | The study of life processes in an organism |
| 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 |
| Pore spaces | Spaces in the soil that determine how much water and air the soil can hold |
| Loam | A mixture of gravel, sand, silt, clay, and organic matter |
| 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 |
| Translocation | The process by which organic substances move through the phloem of a plant |
| Hormones | Chemicals that circulate throughout multicellular organisms, regulating cellular processes by interacting with specifically targeted cells |
| Phototropism | A growth response to light |
| Gravitropism | A growth response to gravity |
| Thigmotropism | A growth response to touch |
| Perfect flowers | Flowers with both stamens and carpels |
| Imperfect flowers | Flowers with either stamens or carpels, but not both |
| Pollination | The transfer of pollen grains from the anther to the carpel in flowering plants |
| Double fertilization | A fertilization process that requires two sperm to fuse with two other cells |
| Seed | An ovule with a protective coating, encasing a mature plant embryo and a nutrient source |
| Fruit | A mature ovary that contains a seed or seeds |
