| A | B |
|---|
| phloem | conducting tissue that carries dissolved sugars down the plant stem |
| capillarity | the tendency for water to creep upward in tubes of small diameter |
| adhesion | an attractive force between unlike molecules |
| transpiration pull | the concept that the negative water pressure created by the loss of water from leaves helps pull water and minerals up the plant stem |
| abscicic acid | destroys the abscission layer |
| parenchyma | these cells are storage cells in many plants |
| taproot | a thick root type that functions in the storage of starches for the rest of the plant as well as water absorption |
| the elongation zone | the zone in which root cells get longer |
| the differentiation zone | the zone in which root cells take on specific functions |
| phototropism | the response of organisms to the length of the daylight or darkness period |
| fibrous roots | threadlike roots that absorb water |
| root cap | consists of a layer of dead cells which helps push the root through the soil |
| meristematic region | the region of rapidly dividing root cells |
| apical meristem | the growing tissue at the tip of the plant |
| xylem | conducting tissue which carries water and minerals up a plant stem |
| root hairs | projections of the root epidermis that increase the surface area of the root for absorption |
| biennials | plants growing two years, reproducing the second year |
