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To identify Parenchyma and Sclerenchyma Tissues in Plants - Lab Experiment, Class 9 Science Video Lecture | Science Class 9
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FAQs on To identify Parenchyma and Sclerenchyma Tissues in Plants - Lab Experiment, Class 9 Science Video Lecture - Science Class 9
| 1. What are parenchyma and sclerenchyma tissues in plants? |  |
Ans. Parenchyma and sclerenchyma are two types of plant tissues. Parenchyma tissue is the most common and versatile type of plant tissue, found in various parts of the plant. It is responsible for photosynthesis, storage, and secretion. Sclerenchyma tissue, on the other hand, provides mechanical support and protection to the plant. It is made up of cells with thick walls containing lignin, making them rigid and strong.
| 2. How can we identify parenchyma tissue in plants? | |
Ans. Parenchyma tissue can be identified based on its characteristics. Parenchyma cells are living cells with thin cell walls and a large central vacuole. They have a prominent nucleus and may contain chloroplasts for photosynthesis. These cells are generally loosely packed, allowing for easy diffusion and transport of materials.
| 3. What are the distinguishing features of sclerenchyma tissue in plants? | |
Ans. Sclerenchyma tissue can be distinguished by its unique features. The cells of sclerenchyma tissue are dead at maturity and have thick, lignified cell walls. These walls provide strength and rigidity to the plant, making sclerenchyma tissue ideal for supporting tissues like stems and vascular bundles. Sclerenchyma cells are often elongated and have tapering ends.
| 4. How can one observe and study parenchyma and sclerenchyma tissues in plants? | |
Ans. To observe and study parenchyma and sclerenchyma tissues in plants, a microscope is usually used. Thin sections of plant tissues are prepared and stained to enhance the visibility of cells. Under a microscope, parenchyma cells appear as irregularly shaped with thin cell walls and a large central vacuole. Sclerenchyma cells, on the other hand, appear elongated with thick, lignified cell walls.
| 5. What are the functions of parenchyma and sclerenchyma tissues in plants? | |
Ans. Parenchyma tissue performs various functions in plants. It is responsible for photosynthesis in leaves, storage of nutrients in roots, and secretion of nectar in flowers. Additionally, parenchyma tissue allows for gaseous exchange and supports the plant structure.
Sclerenchyma tissue, on the other hand, provides mechanical support and protection to the plant. It strengthens the stems, leaves, and other plant parts, enabling them to withstand external pressures and environmental conditions.
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