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Plant Tissues (Meristematic and Permanent) Video Lecture - Class 9

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FAQs on Plant Tissues (Meristematic and Permanent) Video Lecture - Class 9

1. What are meristematic tissues?
Ans. Meristematic tissues are a type of plant tissue that consists of actively dividing cells. These tissues are responsible for plant growth and development. They are found in areas of the plant where growth is occurring, such as the tips of stems and roots. Meristematic tissues help in the formation of new cells, which eventually differentiate into other types of plant tissues.
2. What are the different types of meristematic tissues?
Ans. There are three types of meristematic tissues in plants: apical meristem, intercalary meristem, and lateral meristem. Apical meristem is located at the tips of roots and stems, and it helps in the elongation of these plant parts. Intercalary meristem is found in the nodes of grasses and aids in their rapid growth. Lateral meristem is responsible for the growth in girth or thickness of the plant, and it is found in the cambium layer of stems and roots.
3. What are permanent tissues in plants?
Ans. Permanent tissues are plant tissues that have completed their growth and have become specialized for specific functions. Unlike meristematic tissues, permanent tissues do not divide further. There are two types of permanent tissues: simple permanent tissues and complex permanent tissues. Simple permanent tissues include parenchyma, collenchyma, and sclerenchyma, while complex permanent tissues consist of xylem and phloem.
4. What is the main function of parenchyma tissue?
Ans. Parenchyma tissue is a type of simple permanent tissue found throughout the plant body. It is responsible for various functions such as photosynthesis, storage of food and water, and healing of wounds. Parenchyma cells have thin cell walls and large intercellular spaces, which allow for easy exchange of gases and nutrients. They are also capable of cell division, making them important for plant regeneration.
5. What is the role of xylem tissue in plants?
Ans. Xylem tissue is a complex permanent tissue responsible for the transport of water and minerals from the roots to other parts of the plant. It also provides mechanical support to the plant. Xylem consists of tracheids and vessel elements, which are long, hollow cells that are interconnected. These cells are dead at maturity and have thick lignified cell walls, allowing them to conduct water efficiently.
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