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Revision Question Bank
Tissue
1.
Name the tissue present in the brain.
Sol.
Nervous tissue is present in the brain.
2.
Write one word for the following
(a) Tissue present in soft parts of the plant like cortex and pith of stem.
(b) Long and unbranched extension of a neuron.
(c) A component of phloem formed by end to end fusion of cells with perforated
transverse walls.
(d) Thickenings present in sclerenchyma cells.
(e) Thin, hair-like projections present at the free ends of cuboidal epithelium.
(f) Waterproof layer present on the outer wall of epidermal cells.
(g) The pigment present in red blood cells,
(h) Zig-zag thickenings in cardiac muscles.
Sol.
(a) Parenchyma
(b) Axon
(c) Sieve tubes
(d) Lignin
(e) Cilia
(f) Cuticle
(g) Haemoglobin
3.
(h) Intercalated discs
Which tissue protects the entire body?
Sol.
Epithelial tissue
4.
Name the two types of processes present in neuron.
Sol.
Axon and demlrites
5.
Name the tissue responsible for flexibility in plants. How would you differentiate it from
other permanent tissues?
Sol.
Collenchyma tissue is responsible for llexibility in plants.
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6.
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Draw a flow chart showing the various types of connective tissues.
Sol.
The differentiation of collenchymaifrom other permanent tissues is given below
S. No.
(i)
Parenchyma
Living cells and
isodiametric in shape.
Collenchyma
Living cells, with thick
corners.
(ii)
Cell walls are thin and
made up of cellulose.
(iii)
Cells have distinct
nucleus and a large
central vacuole.
stores food, waste
products and (onus
packing tissue.
Cell walls are thickened at
comers with
extra
deposition of cellulose and
pectin,
Cells have distinct nucleus
and dense
cytoplasm,
(iv)
(v)
7.
It is present in all soft
parts of plant, i.e.. in
stems, roots, leaves,
flowers and fruits.
It gives mechanical support
and elasticity in plants.
It is present below the
epidermis in stems and
leaves.
Sclerenchyma
Dead cells, long and
narrow with tapered
ends.
Cell walls are thick
due to heavy
deposition of lignin.
Cells do not have
nucleus and
cytoplasm.
It gives rigidity and
mechanical strength
to the plant.
It is present in xylem
and phloem, in
shells of nuts, in
hard seeds, pulp of
pear, etc.
Name the following
(a) Tissue that forms the inner lining of our mouth.
(b) Tissue that stores fat in our body.
(c) Tissue that transports food in plants.
Sol.
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(a) Tissue that forms the inner lining of our mouth-Epithelial tissue.
(b) Tissue that stores fat in our body-Adipose tissue.
(c) Tissue that transports food in plants-Phloem tissue.
8.
Match the column A with the column B.
S. No.
(i)
(ii)
(iii)
(iv)
(v)
(vi)
Column A
Fluid connective tissue
Filling of space inside the organs
Striated muscle
Adipose tissue
surface of joints
Stratified squamous epithelium
Column B
Subcutaneous layer
Cartilage
Skeletal muscle
Areolar tissue
Blood
Skin
Sol.
S. No.
Column A
Column B
(i)
Fluid connective tissue
blood
(ii)
Filling of space inside the organs
Areolar tissue
(iii)
Striated muscle
Skeletal muscle
(iv)
Adipose tissue
Subcutaneous layer
(v)
Surface of joints
Cartilage
(vi)
Stratified squamous epithelium
Skin
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Chapter Test {Tissue}
M: Marks: 30
1.
M: Time: 40 Min.
Where is parenchyma found in a plant body?
[1]
Sol.
Parenchyma is universally found in plants. It forms the major tissue of softer parts like
the epidermis, cortex, pith and leaf mesophyll. It is also found in xylem and phloem.
2.
Write any two differences between meristematic and permanent tissues.
[2]
Sol.
(a) Two liquids which are immiscible with each other form the mixture.
(b) The heavier liquid will form the lower layer.
(c) The method is based on
(i) mutual immiscibility of the two liquids
(ii) difference in the densities of the two liquids.
3.
(a) If a potted plant is covered with a glass jar, water vapours appear on the wall of the
glass jar. Explain.
[3]
(b) What is the function of cardiac muscle fibre?
(c) Name the cells of bone and cartilage.
Sol.
(a) Water vapour released through the stomatal aperture during transpiration,
accumulate on the wall of glass jar.
(b) These muscles are found only in heart. They help in beating of heart and work 24
hours a day till death.
(c) Bone—Osteocytes
Cartilage—Chondrocytes.
4.
Differentiate between various types of muscular tissues? Draw appropriate diagram. [5]
Sol.
Differences between various types of muscular tissues are
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Characteristic Striated Muscle
Voluntary
Movement
(under our
control)
Cells are long,
cylindrical and
Shape of cells
unbranched.
Microscopic
feature
Nucleus
Location
Alternate light
or dark bands
present.
Multinucleate
(many nuclei).
Limbs of our
body.
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Smooth Muscle
Involuntary (not under
our control)
Involuntary
Cells are long with
pointed ends
(spindle-shaped).
Cells are cylindrical
and branched,
No such bands found.
No such bands found.
Uninucleate.
Uninucleate.
Alimentary canal, iris of
the eye, in uterus,
bronchi of lungs.
Cardiac Muscle
Heart.
Diagram
5.
List the characteristics of cork. How is it formed? Mention its role.
[3]
Sol.
(i) It is the outer protective tissue of older stem and roots.
(ii) It is formed by secondary lateral meristem called cork cambium,
(iii) The mature cork become dead and filled with tannin, resin and ah-,
(iv) The cells are arranged compactly without intercellular spaces.
(v) The cells become several layers thick, which are impermeable due to deposition of
suberin in their wall.
Formation of Cork
As plant grow older, the outer protective tissue undergoes certain changes. A strip of
secondary meristem replaces the epidermis of stem. Cells on the outside are cut-off from
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this layer. This form several layers thick cork or bark of the no overlap.
Role of Cork
(i) It prevents loss of water by evaporation.
(ii) It protects plant from the invasion of parasites and other harmful microorganisms,
(iii) It is used for manufacture of insulation boards, sport goods, shock absorber, etc
6.
Name the protective tissue of animal body. State the types of this tissue.
[3]
Sol.
Epithelial tissue is the protective tissue of animal body.
Depending upon the shape and function of the cells, they are of following types
(i) Squamous epithelium Simple squamous epithelium consists of extremely thin and flat
cells forming delicate lining, e.g,, the oesophagus and lining of mouth.
(ii) Cuboidal epithelium It consists of cube-like cells with rounded nuclei and forms the
lining of kidney tubules and duct of salivary glands, where it provides mechanical
support.
(iii) Columnar epithelium It consists of pillar-like cells having elongated nuclei. It is
found in inner lining of intestine where absorption and secretion occur.
(iv) Ciliated epithelium The columnar epithelium tissue also has cilia, which are
hair-like projections on the outer surface of epithelial cells.
(v) Glandular epithelium The columnar epithelium is often modified to form glands,
which secrete chemicals.
7.
Answer the following questions
[3]
(a) What is division of labour with reference to multicelhilar organisms?
(b) Why striated muscles are also known as skeletal muscles?
(c) Which structure takes impulse away from a neuron.
Sol.
(a) In multicellular organisms, different functions of the body are assigned to different
group of cells, i.e., these organisms show division of labour.
(b) It is because these muscles are attached to bones.
(c) Axon of neuron carries impulse away from neuron
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8.
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Answer the following questions
[5]
(a) Explain different types of elements present in phloem.
(b) Distinguish between xylem and phloem.
Sol.
(a) Phloem contains following four elements or cells
(i) Sieve Tubes They are slender, tube-like structures composed of elongated thin-walled
cells. The walls of sieves tubes are perforated and contain sieve plates.
(ii) Companion Cells These are generally associated with the sieve tube. They are small
thin walled cell containing dense and very active cytoplasm and large elongated nucleus.
It is connected with sieve tube with numerous plasmodesmata.
(iii) Phloem Parenchyma They are formed of thin walled living cells of parenchyma.
(iv) Phloem Fibres These are thick-walled, elongated spindle shaped dead cells which
posses narrow luman. They provide mechanical strength to tissue.
(b) Differences between xylem and phloem are
S. No.
(i)
(ii)
(iii)
Xylem
Phloem
It conducts organic solutes or food
It conducts water and minerals.
materials.
The components of xylem
Components of phloem include sieve
include tracheids, vessels, xylem tubes, companion cells, phloem
parenchyma and xylem fibres.
parenchyma and phloem fibres,
Three of four elements are living(i.e.,
Three of four elements are dead
sieve tubes, companion cells and phloem
(i.e., tracheids, vessels and
parenchyma) only phloem fibres are
fibres) only xylem parenchyma
dead.
is living.
It provides mechanical strength Phloem fibres provide mechanical
to plant.
strength to plant.
Name the tissue responsible for flexibility in plants. How would you differentiate it from
(iv)
9.
other permanent tissues?
[5]
Sol.
The tissue responsible for flexibility in plants is collenchyma. The distinction of
collenchyma from other permanent tissues is given below:
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S. No.
(i)
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Parenchyma
It consists of relatively
unspecialised cells with
thin walls. The cells of
this tissue are living.
Collenchyma
The cells of this tissue
are living, elongated
and irregularly
thickened at the
corners,
Sclerenchyma
The cells of this tissue
are dead. They are long
and narrow as the walls
are thickened due to
lignin (a chemical
substance which acts as
cement and hardens
them).
(ii)
The cells in this tissue
contain large
intercellular spaces.
There is very little
intercellular space.
The walls of cells are so
thick that there is no
internal space inside
the cell and between
the cells.
(iii)
It provides support to
plants and also stores
food.
It allows easy bending
in various parts of a
plant (leaf, stem)
without breaking. It
also provides
mechanical support to
plants.
It provides strength to
the plant parts.
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