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Page 1 T I S S U E S Page 2 T I S S U E S WHAT ARE TISSUES? A group of cells having a common origin and performing similar function are termed as tissues. Page 3 T I S S U E S WHAT ARE TISSUES? A group of cells having a common origin and performing similar function are termed as tissues. A R E P L A N T S A N D A N I M A L S M A D E O F T H E S A M E T Y P E S O F T I S S U E S ? Plants and animals differ in structure and function. Plants are stationary, with supportive tissue, while animals move actively and have mostly living tissues. Growth patterns also differ, with plants exhibiting localized growth regions and animals displaying more uniform cell growth. Page 4 T I S S U E S WHAT ARE TISSUES? A group of cells having a common origin and performing similar function are termed as tissues. A R E P L A N T S A N D A N I M A L S M A D E O F T H E S A M E T Y P E S O F T I S S U E S ? Plants and animals differ in structure and function. Plants are stationary, with supportive tissue, while animals move actively and have mostly living tissues. Growth patterns also differ, with plants exhibiting localized growth regions and animals displaying more uniform cell growth. Page 5 T I S S U E S WHAT ARE TISSUES? A group of cells having a common origin and performing similar function are termed as tissues. A R E P L A N T S A N D A N I M A L S M A D E O F T H E S A M E T Y P E S O F T I S S U E S ? Plants and animals differ in structure and function. Plants are stationary, with supportive tissue, while animals move actively and have mostly living tissues. Growth patterns also differ, with plants exhibiting localized growth regions and animals displaying more uniform cell growth. P L A N T T I S S U E Meristematic tissue Permanent tissue Plant tissue is of two types:Read More
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FAQs on PPT: Tissues - Science Olympiad Class 9
| 1. What are the main types of plant tissues and their functions? |  |
Ans. The main types of plant tissues are meristematic and permanent tissues. Meristematic tissues are responsible for the growth of plants and are found in areas like the tips of roots and shoots. They consist of actively dividing cells. Permanent tissues, on the other hand, are differentiated and perform specific functions. They can be further classified into simple tissues (such as parenchyma, collenchyma, and sclerenchyma) and complex tissues (such as xylem and phloem). Parenchyma provides support and storage, collenchyma offers flexibility, sclerenchyma gives strength, xylem transports water and minerals, and phloem distributes nutrients.
| 2. What are the characteristics of animal tissues? | |
Ans. Animal tissues can be categorized into four main types: epithelial, connective, muscular, and nervous tissues. Epithelial tissues line surfaces and cavities, providing protection and absorption. Connective tissues support and bind other tissues; they include bone, blood, and adipose tissue. Muscular tissues are responsible for movement and are classified into skeletal, cardiac, and smooth types. Nervous tissue forms the brain, spinal cord, and nerves, facilitating communication within the body. Each type has unique characteristics suited to its specific function in the body.
| 3. How do meristematic tissues contribute to plant growth? | |
Ans. Meristematic tissues are crucial for the growth of plants as they contain undifferentiated cells that can divide and differentiate into various types of specialized cells. These tissues are primarily located at the tips of roots and shoots (apical meristems) and in the cambium (lateral meristems), allowing for both vertical and lateral growth. The continuous division of meristematic cells enables plants to increase in height, develop new leaves, and expand their root systems, which is essential for their survival and adaptation.
| 4. What is the significance of xylem and phloem in plants? | |
Ans. Xylem and phloem are types of complex tissues in plants that play vital roles in the transport of substances. Xylem is responsible for the conduction of water and dissolved minerals from the roots to the rest of the plant. It consists of tracheids and vessel elements that facilitate this upward movement. Phloem, on the other hand, transports organic nutrients, primarily sugars produced during photosynthesis, from the leaves to other parts of the plant. This bidirectional transport system is essential for maintaining plant health and growth.
| 5. What are the differences between parenchyma, collenchyma, and sclerenchyma? | |
Ans. Parenchyma, collenchyma, and sclerenchyma are all types of simple plant tissues with distinct characteristics. Parenchyma cells are thin-walled, flexible, and involved in storage, photosynthesis, and tissue repair. Collenchyma cells have thicker, uneven cell walls that provide flexibility and support, especially in young stems and leaves, allowing for growth without restraining movement. Sclerenchyma cells are thick-walled and provide structural support; they are often dead at maturity and include fibers and sclereids. Each type fulfills specific roles that contribute to the overall function and structure of plants.
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