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NCERT
SOLUTIONS
CLASS - 9th
aglase .co
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Book : Science Ncert Solutions | Chapter-6 Science
Class : 9th
Subject : SCIENCE
Chapter : 6
Chapter Name : TISSUES
Q1 What is a tissue?
Answer. Tissue is a group of cells that are similar in structure and are organised together to
perform a speci c task.
Page : 69 , Block Name : Questions
Q2 What is the utility of tissues in multi-cellular organisms?
Answer. In unicellular organisms, a single cell performs all the basic functions such as respiration,
movement, excretion, digestion, etc. But in multicellular organisms, cells are grouped to form
tissues. These tissues are specialised to carry out a particular function at a de nite place in the
body. For example, the muscle cells form muscular tissues which helps in movement, nerve cells
form the nervous tissue which helps in transmission of messages. This is known as division of
labour in multicellular organisms. It is because of this division of labour that multicellular
organisms are able to perform all functions ef ciently.
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Q1 Name types of simple tissues?
Answer.Simple permanent tissues are of three types: Parenchyma, Collenchyma, and
Sclerenchyma. Parenchyma tissue is of further two types - aerenchyma and chlorenchyma.
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Q2 Where is apical meristem found?
Answer. Apical meristem is present at the growing tips of stems and roots. Their main function is
to initiate growth in new cells of seedlings, at the tip of roots, and shoots.
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Q3 Which tissue makes up the husk of coconut?
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Book : Science Ncert Solutions | Chapter-6 Science
Answer. The husk of a coconut is made up of sclerenchyma tissue.
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Q4 What are the constituents of phloem?
Answer. Phloem is the food conducting tissue in plants. It is made up of four components:
(i) Sieve tubes
(ii) Companion cells
(iii) Phloem parenchyma
(iv) Phloem bres
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Q1 Name the tissue responsible for movement in our body
Answer. The muscular tissue is responsible for movement in our body.
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Q2 What does a neuron look like?
Answer. A neuron consists of a cell body witha nucleus and cytoplasm. It has two important
extensions known as the axon and dendrites. An axon is a long thread-like extension of nerve cells
that transmits impulses away from the cell body. Dendrites, on the other hand, are thread-like
extensions of cell body that receive nerve impulses. Thus, the axon transmits impulses away from
the cell body, whereas the dendrite receives nerve impulses. This coordinated function helps in
transmitting impulses very quickly.
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Q3 Give three features of cardiac muscles.
Answer. Three features of cardiac muscles are:
(i) Cardiac muscles are involuntary muscles that contract rapidly, but do not get fatigued.
(ii) The cells of cardiac muscles are cylindrical, branched, and uninucleate
(iii) They control the contraction and relaxation of the heart.
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Book : Science Ncert Solutions | Chapter-6 Science
Page : 77 , Block Name : Questions
Q4 What are the functions of areolar tissue?
Answer. Functions of areolar tissue:
(i) It helps in supporting internal organs.
(ii) It helps in repairing the tissues of the skin and muscles.
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Q1 De ne the term “tissue”?
Answer. Tissue is a group of cells that are similar in structure and are organized together to
perform a speci c task.
Q2 How many types of elements together make up the xylem tissue? Name them.
Answer. There are four different types of cells that make up the xylem tissue. They are:
(i) Tracheids
(ii) Vessels
(iii) Xylem parenchyma
(iv) Xylem bres
Q3 How are simple tissues different from complex tissues in plants?
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Book : Science Ncert Solutions | Chapter-6 Science
Q4 Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell
wall.
Q5 What are the functions of the stomata?
Answer. Functions of the stomata:
(i) They allow the exchange of gases (C02 and 02) with the atmosphere.
(ii) Evaporation of water from the leaf surface occurs through the stomata. Thus, the stomata help
in the process of transpiration.
Q6 Diagrammatically show the difference between the three types of muscle bres.
Answer. The three types of muscle bres are:Striated muscles, smooth muscles (unstriated muscle
bre), and cardiac muscles.
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Book : Science Ncert Solutions | Chapter-6 Science
Q7 What is the speci c function of the cardiac muscle?
Answer. The speci c function of the cardiac muscle is to control the contraction and relaxation of
the heart.
Q8 Differentiate between striated, unstriated and cardiac muscles on the basis of their structure
and site/location in the body.
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Book : Science Ncert Solutions | Chapter-6 Science
Q9 Draw a labelled diagram of a neuron?
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 uid matrix.
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Book : Science Ncert Solutions | Chapter-6 Science
(f) Tissue present in the brain.
Answer. (a) Tissue that forms the inner lining of our mouth ->Epithelial tissue
(b) Tissue that connects muscle to bone in humans -> Dense regular connective tissue (tendons)
(c) Tissue that transports food in plants -> Phloem
(d) Tissue that stores fat in our body -> Adipose tissue
(e) Connective tissue with a uid matrix -> Blood
(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?
Answer. Skin: Strati ed squamous epithelial tissue
Bark of tree: Simple permanent tissue
Bone: Connective tissue
Lining of kidney tubule: Cuboidal epithelial tissue
Vascular bundle: Complex permanent tissue
Q12 Name the regions in which parenchyma tissue is present?
Answer. Leaves, fruits, and owers are the regions where the parenchyma tissue is present.
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Q13 What is the role of epidermis in plants?
Answer. Epidermisis present on the outer surface of the entire plant body. The cells of the
epidermal tissue form a continuous layer without any intercellular space. It performs the following
important functions:
(i) It is a protective tissue of the plant body
(ii) It protects the plant against mechanical injury
(iii) It allows exchange of gases through the stomata
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Q14 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.
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Book : Science Ncert Solutions | Chapter-6 Science
Page : 79 , Block Name : Exercise
Q15 Complete the following chart:
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