NCERT Solution for Tissues
1. What is a tissue?
Ans. A group of cells that are similar in structure and work together to do a peculiar function is called tissue.
2. What is the utility of tissues in multicellular organisms?
Ans. Tissues provide structural strength, mechanical strength, show division of labour.
1. Name types of simple tissues.
Ans. The types of simple tissues are parenchyma, collenchyma, sclerenchyma and aerenchyma.
2. Where is apical meristem found?
Ans. Apical meristem is found at the tip of root or shoot of the plant.
3. Which tissue makes up the husk of coconut?
Ans. The husk of coconut is made of sclerenchymatous tissue.
4. What are the constituents of phloem?
Ans. Phloem is made up of four types of elements sieve tube, companion cells, phloem fibres and phloem parenchyma.
1. Name the tisswe responsible for movement in our body.
Ans. 1. Muscular tissue, 2. Nervous tissue, combination of both the tissues are responsible for movement in our body.
2. What does a neuron look like?
Ans. A neuron consists of a cell body with a nucleus and cytoplasm, from which long thin hair like parts arise. Each neuron has a single long part called the axon, and many small, short branched parts called dendrite. An individual nerve cell is called neuron, it may be upto a metre long.
3. Give three features of cardiac muscles.
Ans. Feature of cardiac muscles
(1) Heart muscles (cardiac muscles) are cylindrical, branched and uninucleated
(2) They are striated muscle fibres.
(3) They are involuntary muscles, cannot be controlled by us.
4. What are the functions of areolar tissue?
Ans. Areolar tissue are connective tissues found in animal. It is found between skin and muscles, around blood vessels and nerves and in the bone marrow. It fills the space inside the organs, supports internal organs and helps in the repair of tissues.
Questions From NCERT Textbook
1. Define the term "tissue".
Ans. Group of cells that are similar in structure and perform same function is called a tissue.
2. How many types of elements together make up the xylem tissue? Name them.
Ans. The xylem is made up of vessels, trachieds, xylem fibres and xylem parenchyma.
3. How are simple tissues different from complex tissues in plants?
Ans. Simple tissues are made up of one type of cells which coordinate to perform a common function. Complex tissues are made up of more than one type of cells. All these coordinate to perform a common function.
4. Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall
Ans. Parenchyma: The cells have thin cell walls made up of cellulose.
Collenchyma: The cells have cell walls thickened at the corners due to pectin deposition.
Sclerenchyma: Their walls are thickened due to lignin deposition.
5. What are the functions of stomata?
Ans. The outermost layer of the cell is called epidermis and is very porous. These pores are called stomata. These stomata help in transpiration and exchange of gases.
6. Diagrammaticafty show the difference between the three types of muscle fibres.
Ans. Striated muscles
(1) They are connected to bones (Skeletal muscles).
(2) They are voluntary muscles.
(3) The cells are long, cylindrical with many nucleus and are unbranched.
Smooth muscles
(1) They are found in alimentary canal and lungs.
(2) They are involuntary muscles.
(3) They are spindle in shape and have single nucleus.
Cardiac muscles
(1) They are found in heart.
(2) They are involuntary in action.
(3) They are branched and have one nucleus.
7. What is the specific function of the cardiac muscle?
Ans. (1) Cardiac muscles cells are cylindrical, branched and uninucleated.
(2) They are involuntary muscles.
(3) They show rhythmically contraction and relaxation throughout life.
(4) Their rhythmic contraction and relaxation helps in pumping action of heart.
8. Differentiate between striated, unstiiated and cardiac muscles on the basis of their structure and location in the body.
Ans.
9. Draw a labelled diagram of neuron.
Ans.
10. Name the following:
(1) Tissue that forms the inner lining of our mouth.
(2) Tissue that connect muscle to bone in humans,
(3) Tissue that transports food in plants.
(4) Tissue that stores fat in our body.
(5) Connective tissue with a fluid matrix:.
(6) Tissue present in the brain.
Ans. (1) Squamous epithelium
(2) Tendons
(3) Phloem
(4) Areolar tissue
(5) Blood
(6) Nervous tissue
11. Identify the type of tissue in the following: Skin, bark of tree, bone, lining of kidney tubule, vascular bundle.
Ans. (a) Skin–Striated squamous epithelium
(b) Bark of tree–Cork, protective tissue
(c) Bone–Connective tissue
(d) Lining of kidney tubule–Cuboidal epithelium tisse
(e) Vascular bundle–Conducting tissue
12. Name the regions in which parenchyma tissue is present.
Ans. In the pith of the roots and stems. When it contains chlorophyll, it is called chlorenchyma, found in green leaves. In aquatic plants, parenchyma contains large air cavities and help them to float. Such type of parenchyma is called aerenchyma.
13. What is the role of epidermis in plants?
Ans. Cells of epidermis forms a continuous layer without intercellular spaces. It protects all the parts of plants.
14. How does the cork act as a protective tissue?
Ans. Cork acts as a protective tissue because its cells are dead and compactly arranged without intercellular spaces. They have deposition of suberin on the walls that make them impervious to gases and water.
15. Complete the table:
Multiple Choice Questions For Tissues
1. The cells of cork are dead and have a chemical in their walls that makes them impervious to gases and water. The chemical is
(a) lignin
(b) suberin
(c) cutin
(d) wax
2. The flexibility in plants is due to a tissue called
(a) chlorenchyma
(b) parenchyma
(c) sclerenchyma
(d) collenchyma
3. The tissue present in the lining of kidney tubules and ducts of salivary glands is
(a) squamous epithelium tissue
(b) glandular epithelium tissue
(c) cuboidal epithelium tissue
(d) columar epithelium tissue
4. The connective tissue that connects muscle to bone is called
(a) ligament
(b) tendon
(c) nervous tissue
(d) all of the above
5. The tissue that helps in the movement of our body are
(a) musclar tissue
(b) skeletal tissue
(c) nervous tissue
(d) all of the above
6. Sieve tubes and companion cells are present in
(a) xylem
(b) phloem
(c) cork
(d) cambium
7. The size of the stem increases in the width due to
(a) apical meristem
(b) intercalary meristem
(c) primary meristem
(d) lateral meristem
8. Cartilage and bone are types of
(a) muscular tissue
(b) connective tissue
(c) meristematic tissue
(d) epithelial tissue
9. Xylem and phloem are examples of
(a) epidermal tissue
(b) simple tissue
(c) protective tissue
(d) complex tissue
10. A tissue whose cells are capable of dividing and re-dividing is called
(a) complex tissue
(b) connective tissue
(c) permanent tissue
(d) meristematic tissue
Sample Paper Tissues
1. What is the function of cartilage and bone?
2. What are the different types of tissues present in plants?
3. What are the different types of tissues present in animals?
4. Draw a neat labeled diagram of nervous tissue.
5. What is the function of stomata?
6. What is the role of epidermis?
7. What are complex tissues? Explain their types.
8. Define the structure of neuron.
10. Explain various types of blood cells.
Hots for Tissues
1. Give four differences between bone and cartilage.
2. Give the functions of cartilage.
3. Give difference between xylem and pholem.
5. Why does epidermal tissue have no intercellular space?
6. Name and give the function of each cell of xylem.
7. Why is blood called connective tissue?
8. State the difference between simple tissues of plants.
9. Explain the structure, function and location of nervous tissue.
10. Describe ‘epidermis’ in plants.
TEST
Tissues
Maximum marks- 3 Maximum time- 45 mins
1. Write a note on plant tissues? (5 marks)
2. What is the function of connective tissues? Explain its types. (4 marks)
3. Draw a structure of a nerve cell (neuron). (3 marks)
4. What is the region where parenchyma tissue is present? (2 marks)
5. What is the point of difference between cardiac muscle and striated muscle? (2 marks)
6. Draw a neat diagram of a smooth muscle. (3marks)
7. Where is epical tissue present? (1 mark)
8. What are the various types of an animal tissue? (5 marks)
9. Write the difference between xylem and phloem. (3 marks)
10. Write the difference between a bone and cartilage. (2 marks)
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