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RBSE Solutions for Class 9 Science Chapter 6 Tissues

April 14, 2022 by Prasanna Leave a Comment

Rajasthan Board RBSE Solutions for Class 9 Science Chapter 6 Tissues Textbook Exercise Questions and Answers.

RBSE Class 9 Science Solutions Chapter 6 Tissues

RBSE Class 9 Science Chapter 6 Tissues InText Questions and Answers

Page No. 69

Question 1.
What is a tissue?
Answer:
Tissue is a group of cells that are similar in structure and are organised together to perform a specific task.

Question 2.
What is the utility of tissues in multi-cellular organisms?
Answer:
The different types of tissues perform different functions in multicellular organisms. Since a particular group of cells carry out only a particular function, they do it very efficiently. So, multicellular organisms possess a definite division of labour.

Page No. 73

Question 1.
Name types of simple tissues.
Answer:
There are three types of simple tissues :

  1. Parenchyma
  2. Collenchyma
  3. Sderenchyma

Question 2.
Where is apical meristem found?
Answer:
Apical meristem is present at the growing tips of stem and roots.

RBSE Solutions for Class 9 Science Chapter 6 Tissues

Question 3.
Which tissue makes up the husk of coconut?
Answer:
Sclerenchyma tissue makes up the husk of coconut.

Question 4.
What are the constituents of phloem?
Answer:
The constituents of phloem are :

  • Sieve tubes
  • Companion cells
  • Phloem parenchyma
  • Phloem fibres

Page No. 77

Question 1.
Name the tissue responsible for movement in our body.
Answer:
Muscular tissue.

Question 2.
What does a neuron look like?
Answer:
Neuron looks like a star-shaped cell with a tail.

Question 3.
Give three features of cardiac muscles.
Answer:

  • Cardiac muscles are involuntary muscles that contract quickly, but do not get fatigued.
  • The cells of cardiac muscles are cylindrical, branched, and having one nucleus.
  • They control the contraction and relaxation of the heart.

RBSE Solutions for Class 9 Science Chapter 6 Tissues

Question 4.
What are the functions of areolar tissue?
Answer:
Functions of areolar tissue:

  • It helps in supporting internal organs.
  • It helps in repairing the tissues of the skin and muscles.

RBSE Class 9 Science Chapter 6 Tissues Textbook Questions and Answers

Question 1.
Define the term “tissue”.
Answer:
Tissue is a group of cells that are similar in structure and are organised together to perform a specific task.

Question 2.
How many types of elements together make up the xylem tissue? Name them.
Answer:
Xylem is made up of following elements :

  • Tracheids
  • Vessels
  • Xylem parenchyma
  • Xylem fibres

Question 3.
How are simple tissues different from complex tissues in plants?
Answer:

Simple Tissue Complex Tissue
1. These tissues consist of only one type of cells. 1. These tissues are made up of more than one type of cells.
2. The cells are more or less similar in structure and perform similar functions. 2. Various types of cells perform various functions. For example: In the xylem tissue, tracheids help in water transport, whereas parenchyma stores food.
3. Three types of simple tissues in plants are parenchyma, collenchyma, and sclerenchyma. 3. Two types of complex permanent tissues in plants are xylem and phloem.

RBSE Solutions for Class 9 Science Chapter 6 Tissues

Question 4.
Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall.
Answer:

Parenchyma Collenchyma Sclerenchyma
1. Cell walls are relatively thin, and the cells in parenchyma tissues are loosely, packed. 1. The cell wall is irregularly thickened at the corners, and there is very little space between the cells. 1. The cell walls are uniformly thickened, and there are no intercellular spaces.
2. The cell wall in this tissue is made up of cellulose. 2. Pectin and hemicellulose are the major constituents of the cell wall. 2. An additional layer of the cell wall composed mainly of lignin is found.

Question 5.
What are the functions of the stomata?
Answer:
The functions of stomata are:

  • Exchange of gases (CO2 and O2) with atmosphere.
  • Transpiration which is the loss of excess water in the form of water vapours.

Question 6.
Diagrammatically show the difference between the three types of muscle fibres.
Answer:
The three types of muscle fibres are: Striated muscles, smooth muscles (unstriated muscle fibres), and cardiac muscles.
RBSE Solutions for Class 9 Science Chapter 6 Tissues 1
(a) Striated muscle fibres
RBSE Solutions for Class 9 Science Chapter 6 Tissues 2
(b) Unstriated muscle fibres
RBSE Solutions for Class 9 Science Chapter 6 Tissues 3
(c) Cardiac muscle fibres

Question 7.
What is the specific function of the cardiac muscle?
Answer:
The specific function of the cardiac muscle is to control the contraction and relaxation of the heart.

RBSE Solutions for Class 9 Science Chapter 6 Tissues

Question 8.
Differentiate between striated, unstriated and cardiac muscles on the basis of their structure and site/location in the body.
Answer:

Striated muscle Unstriated muscle Cardiac muscle
1. On the basis of structure: Cells are cylindrical. 1. Cells are long. 1. Cells are cylindrical.
2. Cells can have more than one nucleus. 2. Cells have single nucleus. 2. Cells have single nucleus.
3. Cells are not branched. 3. Cells are not branched. 3. Cells are branched.
4. Its ends are blunt. 4. Its ends are tapering. 4. Its ends are flat and wavy.
5. On the basis of location:
These muscles control the working of body parts such as hands, legs, tongue, etc.
5. These muscles control the movement of food in the alimentary canal, the contraction and relaxation of blood vessels, etc. 5. These muscles control the contraction and relaxation of the heart.

Question 9.
Draw a labelled diagram of a neuron.
Answer:
RBSE Solutions for Class 9 Science Chapter 6 Tissues 4

Question 10.
Name the following :
(a) Tissue that forms the inner lining of our mouth.
(b) Tissue that connects muscle to bone in humans.
(c) Tissue that transports food in plants.
(d) Tissue that stores fat in our body.
(e) Connective tissue with a fluid matrix.
(f) Tissue present in the brain.
Answer:
(a) Epithelial tissue
(b) Tendon
(c) Phloem
(d) Adipose tissue
(e) Blood
(f) Nervous tissue

RBSE Solutions for Class 9 Science Chapter 6 Tissues

Question 11.
Identify the type of tissue in the following: skin, bark of tree, bone, lining of kidney tubule, vascular bundle.
Answer:

  • Skin: Stratified squamous epithelial tissue
  • Bark of tree: Simple permanent tissue
  • Bone: Connective tissue
  • Lining of kidney tubule: Cuboidal epithelial tissue
  • Vascular bundle: Complex permanent tissue

Question 12.
Name the regions in which parenchyma tissue is present.
Answer:
Leaves, fruits, and flowers are the regions in which parenchyma tissue is present.

Question 13.
What is the role of epidermis in plants?
Answer:
Epidermis is present on the outer surface of the entire plant body and responsible for following functions :

  • It protects the plant against mechanical injury.
  • It protects tissue of the plant body.
  • It allows exchange of gases through the stomata.

Question 14.
How does the cork act as a protective tissue?
Answer:
The bark of a tree is known as the cork which is made up of dead cells. Thus, it protects the plant against injury, extreme temperature, etc. It also prevents the loss of water by evaporation.

RBSE Solutions for Class 9 Science Chapter 6 Tissues

Question 15.
Complete the table:
RBSE Solutions for Class 9 Science Chapter 6 Tissues 5
Answer:
RBSE Solutions for Class 9 Science Chapter 6 Tissues 6

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