NCERT Solutions for Class 9 Science, Chapter 6: Tissues

Class 9 is the first stepping stone for a student in the competitive world. With the introduction of the CBSE Board Exam for class 10 a few years back, this has become an important gateway for a student. Based on the results of class 9th a student selects his future stream of Science, Commerce or Arts suiting his interest.

Takshila Learning is providing NCERT Solutions for Class 9 Biology as per the latest syllabus by CBSE. Class 9 is the building block for the CBSE Class 10 Board Exams, not only for your exams but also for your higher studies and career. Biology is the most essential subject and the knowledge in this field opens up wider career opportunities for the students.

Below you can find the NCERT solution for Class 9th Biology. You can get a Solution for the all-important question of Class 9 Science, Chapter 6: Tissues

Ans:

A tissue is defined as a cluster of cells which are similar in structure and work together to perform a particular function.

Q2. What is the utility of tissues in multicellular organisms?

Ans:

The use of tissues in multicellular organisms allows the division of labor, along with providing structural and mechanical strength.

Exercise-6.2 Questions with Answer

Q3. Name types of simple tissues.

Ans:

The types of simple tissues are as follows:

➢ Parenchyma

➢ Collenchyma

➢ Sclerenchyma

 

Q4. Where is apical meristem found?

Ans:

In plants, apical meristem are typically found at:

• The tip of the shoot
• Root of the plant

 

Q5. Which tissue makes up the husk of coconut?

Ans:

Sclerenchymatous tissue, which is a type of permanent tissue, forms coconut husk. These tissues make the plant hard and rigid. The cells in this tissue die and their cell walls become thick due to the presence of lignin.

Q6. What are the constituents of phloem?

Ans:

The phloem constitutes of the following four elements, they are:

➢ Sieve tube

➢ Companion cells

➢ Phloem parenchyma

➢ Phloem fibres

Exercise-6.3 Questions with Answer

 

Q7. Name the tissue responsible for movement of our body.

Ans:

Two tissues jointly are responsible for the movement of our body, namely:

➢ Muscular tissue

➢ Nervous tissue

 

Q8. What does a neuron look like?

Ans:

A neuron is a nerve cell in which there is a nucleus and cytoplasm in the cell body from which long and thin hair grows out like a structure. Each neuron has a long section known as the axon, and several short and short-branched structures are known as dendrites. A single neuron can also be one meter long.

 

Q9. Give three features of cardiac muscles.

Ans:

The cardiac muscles are specialized tissues that are evolved to pump blood throughout the body.

The following are the features of the cardiac muscles:

➢ They are cylindrical in shape.

➢ Striated muscle fibers.

➢ They are uninucleated and branched.

➢ These muscles are involuntary in nature.

 

Q10. What are the functions of areolar tissue?

Ans:

Tissue tissues are commonly seen in animals. They are connective tissue and are found between skin and muscles. They are also located around blood vessels and veins and are present in the bone marrow. The space inside the organs is filled with these tissues. They support delicate internal organs and aid tissue repair in case of damage.

 Exercise Page:78

 

Q1. Define the term ’tissue’?

Ans:

A tissue is defined as a cluster of cells which are similar in structure and work together to perform a particular function.

 

Q2. How many types of elements together make up the xylem tissue? Name them.

Ans:

The xylem tissue is made up of four main elements, namely:

➢ Vessels

➢ Tracheids

➢ Xylem fibres

➢ Xylem parenchyma

 

Q3. How are simple tissues different from complex tissues in plants?

Ans:

The following are the differences:

Simple tissues	Complex tissues
They are made up of a single type of cell that performs only one common function	They are made up of more than one kind of a cell that coordinate to perform one particular function

 

Q4. Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall.

Ans:

The following are the differences based on cell wall between different tissues:

Parenchyma	Collenchyma	Sclerenchyma
Cell walls are thin and made up of cellulose	Cell walls are thick at the edges due to the deposition of pectin	Cell walls are thick due to the deposition of lignin

 

Q5. What are the functions of the stomata?

Ans:

The stomata are small pores present on the epidermis, the outer layer of cells. Stomata brings about the exchange of gases and transpiration.

 

Q6. Diagrammatically show the difference between the three types of muscle fibres.

Ans:

There are three types of muscle fibres, they are:

1. Cardiac muscles

• Present in the heart.
• Involuntary in nature.
• They have 1 nucleus.
• The muscle fibers are branched.

2. Smooth muscles

• Found in lungs and alimentary canal.
• Involuntary in nature.
• They have 1 nucleus.
• They are spindle shaped.

3. Striated muscles

• They are connected with bones
• Voluntary in nature.
• They are long and cylindrical muscle fibers.
• They possess many nuclei.
• Striated muscles are unbranched.

 

Q7. What is the specific function of the cardiac muscle?

Ans:

The heart muscles are branched and cylindrical. They are indisputable and involuntary in nature. Throughout the lifespan, heart muscles report rhythmic contractions and relaxation.

 

Q8. Differentiate between striated, un-striated and cardiac muscles on the basis of their structure and site/location in the body.

Ans:

The following are the differences between different types of muscles based on their structure and location in the body.

Character	Striated muscles	Un-striated muscles	Cardiac muscles
Shape/Structure	Long, cylindrical, non – tapering. They are un-branched.	Long and tapering. They are un – branched.	Cylindrical and non – tapering. They are branched.
Location in body	Hands, legs and skeletal muscles	Wall of stomach, intestine, ureter and bronchi	Heart
Dark and light bands	Present	Absent	Present but less prominent

 

Q9. Draw a labelled diagram of a neuron.

Ans:

Diagram of a neuron along with the labelling is as follows:

 

Q10. 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.

Ans:

(a) Tissue that forms the inner lining of our mouth – The epithelial tissue, Squamous epithelium.

(b) Tissue that connects muscle to bone in humans – Tendon

(c) Tissue that transports food in plants – Phloem

(d) Tissue that stores fat in our body – Adipose tissue

(e) Connective tissue with a fluid matrix – Blood, it is a fluid connective tissue

(f) Tissue present in the brain – Nervous tissue

 

Q11. Identify the type of tissue in the following:

Skin, bark of tree, bone, lining of kidney tubule, vascular bundle.

Ans:

➢ Skin: Striated squamous epithelial tissue

➢ Bark of tree: Protective tissue and cork

➢ Bone: Connective tissue

➢ Lining of kidney tubule: Cuboidal epithelial tissue

➢ Vascular bundle: Conducting tissue(xylem and phloem). Complex permanent tissue

 

Q12. Name the regions in which parenchyma tissue is present.

Ans:

The parenchyma is found in:

• Crater of stems and roots• When parenchyma contains chlorophyll, it is called chloranchima, it is found in green leaves.• The parenchyma found in aquatic plants have large air cavities that enable them to float and are therefore called airenakima.

 

Q13. What is the role of epidermis in plants?

Ans:

In plants the epidermis forms a seamless and continuous layer with no intercellular space. It provides security.

 

Q14. How does the cork act as a protective tissue?

Ans:

Cork cells are dead. The arrangement of cells is so dense, that there is no intercellular space. Cellarine deposits are seen on the walls of cells making them impermeable to water and gases.

 

 

Tag – NCERT Class 9 Science Pdf ; NCERT Solutions for Class 9 Science Ch-6; NCERT Class 9 Science chapter 6 Pdf; NCERT Solutions for Class 9 Science Chapter 6; what are tissues; tissues class 9; tissues class 9 questions and answer; NCERT Science Class 9; tissues class 9 notes; tissues class 9 pdf