NCERT Solutions Class 9 Science Chapter 6 Tissues

NCERT Solutions Class 9 Science Chapter 6 Tissues have been provided below and is also available in Pdf for free download. The NCERT solutions for Class 9 Science have been prepared as per the latest syllabus, NCERT books and examination pattern suggested in Class 9 by CBSE, NCERT and KVS. Questions given in NCERT book for Class 9 Science are an important part of exams for Class 9 Science and if answered properly can help you to get higher marks. Refer to more Chapter-wise answers for NCERT Class 9 Science and also download more latest study material for all subjects. Chapter 6 Tissues is an important topic in Class 9, please refer to answers provided below to help you score better in exams

Chapter 6 Tissues Class 9 Science NCERT Solutions

Class 9 Science students should refer to the following NCERT questions with answers for Chapter 6 Tissues in Class 9. These NCERT Solutions with answers for Class 9 Science will come in exams and help you to score good marks

Chapter 6 Tissues NCERT Solutions Class 9 Science

Class 9 Science
NCERT Solutions
Tissues

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.

2. What is the utility of tissues in multi-cellular organisms?
Answer : In multicellular organisms, the different types of tissues perform different functions. 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.

Tissues

1. Name types of simple tissues.
Answer : Simple permanent tissues are of three types:→ Parenchyma
→ Collenchyma
→ Sclerenchyma
Parenchyma tissue is of further two types:
• Aerenchyma
• Chlorenchyma

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

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

4. What are the constituents of phloem?
Answer : The constituents of phloem are:
→ Sieve tubes
→ Companion cells
→ Phloem parenchyma
→ Phloem fibres

Tissues

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

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

3. Give three features of cardiac muscles.
Answer : Three features of cardiac muscles are:
→ Cardiac muscles are involuntary muscles that contract rapidly, but do not get fatigued.
→ The cells of cardiac muscles are cylindrical, branched, and uninucleate.
→ They control the contraction and relaxation of the heart.

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.

Excercise

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

2. How many types of elements together make up the xylem tissue? Name them.
Answer : Xylem is composed of following elements:
→ Tracheids
→ Vessels
→ Xylem parenchyma
→ Xylem fibres

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

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

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

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

5. What are the functions of the stomata?
Answer : The functions of stomata are:
→ The exchange of gases (CO2 and O2) with the atmosphere.
→ The loss of excess water in the form of water vapour which is known as transpiration.

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 fibre), and cardiac muscles.

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.

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
  On the basis of structure:        
Cells are cylindrical   Cells are long   Cells are cylindrical
Cells are not branched   Cells are not branched   Cells are branched
Cells are multinucleate   Cells are uninucleate   Cells are uninucleate
Alternate light and dark bands are present There are no bands present   Faint bands are present
Its ends are blunt   Its ends are tapering   Its ends are flat and wavy
  On the basis of location:        
These muscles are   These muscles control the   These muscles
  present in body parts   movement of food in the   control the contraction
  such as hands, legs,   alimentary canal, the contraction   and relaxation of the
  tongue, etc.   and relaxation of blood vessels, etc. heart


9. Draw a labelled diagram of a neuron.
Answer :

 

10. Name the following:

(a) Tissue that forms the inner lining of our mouth.
Answer : Epithelial tissue

(b) Tissue that connects muscle to bone in humans.
Answer : Tendon

(c) Tissue that transports food in plants.
Answer : Phloem

(d) Tissue that stores fat in our body.
Answer : Adipose tissue

(e) Connective tissue with a fluid matrix.
Answer : Blood

(f) Tissue present in the brain.
Answer : Nervous tissue

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

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

13. What is the role of epidermis in plants?
Answer : Epidermisis present on the outer surface of the entire plant body which perform following role:
→ It is a protective tissue of the plant body.
→ It protects the plant against mechanical injury.
→ It allows exchange of gases through the stomata.

14. How does the cork act as a protective tissue?
Answer : The outer protective layer or bark of a tree is known as the cork. It is made up of dead cells. Therefore, it protects the plant against mechanical injury, temperature extremes, etc. It also prevents the loss of water by evaporation.

15. Complete the table:

Answer :

 

Question. Among the following, which has the highest BRAIN TO BODY LENGTH ratio?
(a) Human
(b) Monkey
(c) Cat
(d) Squirrel

Answer : B

Question. In a leaf, chloroplast-containing cells are known to be the sites of photosynthesis. In which part of the leaf are the majority of chloroplast-bearing cells likely to be found?

(a) upper surface of the leaf
(b) lower surface of the leaf
(c) equally throughout the leaf
(d) edges of the leaf

Answer : A

Question. The figure below shows a potometer with its parts marked. Its functioning is described below: shoot is held in place in the tube using a rubber stopper with a hole. A bubble is introduced into the capillary. The position of the bubble is set at the start of the experiment by turning the tap on the reservoir. The distance the bubble travels in a given time is noted. What does the potometer probably measure?
(a) Oxygen intake by a plant.
(b) Carbon dioxide intake by a plant.
(c) ater intake by a plant.
(d) Effect of water salinity on a plant.

Answer : C

Question. Cell theory states that all organisms are made up of one or more similar units of organization called cells. Which of the following organisms do not strictly adhere to this theory?
(a) protozoa
(b) bacteria
(c) viruses
(d) algae

Answer : C

Question. Which of the following protects the ANIMAL cell from the outside environment?
(a) Cell wall
(b) Plasma membrane
(c) Nuclear membrane
(d) Cytoplasm

Answer : B

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NCERT Solutions Class 9 Science Chapter 6 Tissues

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Class 9 NCERT Solution Science Chapter 6 Tissues

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