Tissues Class 9 Biology Worksheet Pdf
Class 9 Biology students should refer to the following printable worksheet in Pdf for Tissues in standard 9. This test paper with questions and answers for Grade 9 Biology will be very useful for exams and help you to score good marks
Class 9 Biology Worksheet for Tissues
CBSE Class 9 Biology Worksheet - Tissues
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Answer the following questions:
1. What are the dividing cells at the tip of root and stem known as?
2. What are stomata?
3. Name the connective tissue which is found between skin and muscles.
4. What are vascular bundles?
5. Why are smooth muscles called as visceral muscles?
6. What are blood platelets?
7. Name the tissue which allows aquatic plants to float.
8. Why vessels and tracheids have tubular structures?
9. What are the four components of zylem?
10. Name the tissue which provides flexibility to plants.
11. Name the meristem which is responsible for the increase of girth of root.
12. What is the difference between collenchymas and sclerenchyma?
13. What happens when dried raisins are kept in water for a few hours?
14. Why is blood considered to be a connective tissue?
15. Differentiate between chlorenchyma and Acrenchyma.
16. Name the liquid matrix of blood. What does it contain?
17. What is lymph? What are its functions?
18. Name the fat storing tissue in our body.
19. How muscles are able to contract and relax to bring about movements.
20. What is lignin? Where is it present.
Exam Questions NCERT Class 9 Science Chapter 6 Tissue
Question. What are characteristic structural features of meristematic cells?
Ans : Meristematic cells have :
1. Thin cell walls.
2. Abundant or dense cytoplasm and single large nucleus.
3. Spherical, oval, polygonal or rectangular shape.
4. No intercellular spaces between them.
5. Either no vacuoles at all or few vacuoles.
Question. Name the following tissues.
(i) Which tissue covers the external surface in animals?
(ii) Which tissue stores fat in animals?
(iii) Which tissue joins bone to bone?
(iv) Which tissue divides and re-divides and responsible for growth in plants?
Ans : (i) Epithelial tissue
(ii) Adipose tissue
(iv) Meristematic tissue
Question. Write the characteristics of collenchyma.
Ans : The cells in this type of tissue are living, elongated and thickened with cellulose at the corners. There is very little intercellular space. This tissue provides flexibility and mechanical support to plants. This tissue is found in hypodermis of stems and leaf stalks.
Question. What are blood platelets?
Ans : Blood platelets are minute (about 2 to 4 μm in diameter), anucleated, disc like bodies. The main function of platelets is to help in clotting of blood.
Question. Where is parenchyma tissue present?
Ans : Parenchyma tissue is present below the epidermis.
Question. What is the function of connective tissue?
Ans : Connective tissue connects different tissues and organs. It provides support to different parts of the body by forming packing around different organs of the body.
Question. Describe the structure of sclerenchyma. Write its major functions.
Ans : Sclerenchyma is the chief mechanical tissue of plants. The cells of this tissue are usually long, narrow and pointed at both ends. Due to deposition of lignin their walls are often very highly thickened hence the lumen or cell cavity is nearly obliterated. They are usually provided with simple pits which may be oblique or straight. It provides strength to the plant parts.
Question. Define differentiation.
Ans : The process of taking up permanent size, shape and function of cell is called differentiation.
Question. Why do meristematic cells lack vacuoles?
Ans : Meristematic cells divide frequently to give rise to new cells. So, they need dense cytoplasm and soft cell wall. Vacuoles cause hindrance in cell division as they are full to cell sap and provide turgidity and rigidity to the cell.
Question. There was a paralytic patient, who cannot walk.
(i) Which tissues are responsible for the movement of the body?
(ii) Which tissues are present in spine and brain?
Ans : (i) Muscular and nervous tissues are responsible for the movement of the body.
Question. What is epithelial tissue?
Ans : Epithelial tissue : Epithelial tissue forms covering of entire surface of the body and lines the internal organs, because of this epithelial tissue is called protective tissue. It also forms a barrier to keep different body system separate. In this tissue, cells are closely associated and arranged on a very thin extracellular fibrous basement membrane. Epithelial tissue may be composed of one (simple epithelium) or more layers of cells (compound epithelium).
Question. What are muscular tissue? What is their function?
Ans : This is a specialised tissue which is composed of contractile, fibre-like cell. This tissue is responsible for movement in our body. Function : The movement of the body or limbs is brought about by contraction and relaxation of contractile proteins present in muscle cells.
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