collect powdery substance of the spots on leaves and observe under microscope write down your observations
Answers
Answer .When seen under a microscope, a plant cell is somewhat rectangular in shape and displays a double membrane which is more rigid than that of an animal cell. The cell also appears green in color due to the chlorophyll pigment within the chloroplasts. Other organelles may also be seen, depending on the type of plant.
Explanation:
1. The leaves and stems of aquatic plants are found floating on the water surface for the process of gaseous exchange. It involves the intake of carbon-di-oxide and release of oxygen.
2. In aquatic plants, large air cavities are present in parenchyma to give buoyancy to the plants to help them to float. Such parenchyma type is called are aerenchyma.
3. When optimum sunlight is not present beneath the water surface, the leaves come up to the surface to carry out the process of photosynthesis efficiently.