| A | B |
|---|
| stomata | tiny openings in the leaves |
| transpiration | water exiting through the leaves |
| hormones | chemicals which control how plants grow |
| tropism | growth response of plants to the environment |
| phototropism | plant response to light |
| geotropism | plant response to gravity |
| photoperiodism | plant response to the period of light |
| meristem | where plant growth occurs |
| guard cell | control opening of the stomata |
| root hair | absorb water around soil particles |
