Answer:
The straightness of leaves and stems of herbaceous plants, on irrigating the soil, due to the swelling of their internal tissues cells, as a result of the pressure of water to their vacuoles by osmosis.Sha
Explanation:
The shape and the support in plants are provided by two systems. The straightness of a plant stem after watering is due to the presence of physiological and structural support.
Plant support is the mechanism that includes physiological and structural support. They aid in the maintenance of shape and provide protection to the plant structures.
The physiological support includes the turgid support regulated by osmosis. It involves the water and its movement in the sap vacuoles that alter the size of the plant cell.
The structural support includes the cell wall and membrane that is due to the deposition of the chemicals that prevents water loss, support plant parts and provides protection.
Therefore, the physiological and structural support maintains the straightness of a plant stem.
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