Intext Questions

Q.1     What is a tissue?
Sol.     A group of cells which is meant to serve a special function is called tissue.

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Q.2     What is the utility of tissues in multicellular organisms?
Sol.     Tissues facilitate division of labour. Different tissues are responsible for different functions, which is important for the functioning of a multicellular organism.

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Q.1     Name types of simple tissues.
Sol.     Simple tissues are as follows:
(a) Parenchyma
(b) Collenchyma
(c) Sclerenchyma

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Q.2     Where is apical meristem found?
Sol.     Apical meristem is found at root apex, shoot apex, leaf buds, etc.

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Q.3     Which tissue makes up the husk of coconut?
Sol.     Sclerenchyma

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Q.4     What are the constituents of phloem?
Sol.     Phloem is composed of sieve tubes, companion cells, phloem fibres and phloem parenchyma.

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Q.1     Name the tissue responsible for movement in our body.
Sol.     Muscular tissue

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Q.2     What does a neuron look like?
Sol.     Neuron looks like a star-shaped cell with a tail.

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Q.3     Give three features of cardiac muscle.
Sol.     Three features of cardiac muscle are as follows:
(a) Cells are branched fibres.
(b) Striations are present on cells.
(c) Cells are capable of continuous contraction and relaxation.

Exercise

Q.1     Define the term “tissue”.
Sol.     A group of cells which is meant to perform a specific function is called tissue.

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Q.2     How many types of elements together make up the xylem tissue? Name them.
Sol.     Xylem is composed of these elements: tracheids, xylem vessel, xylem parenchyma and xylem fibre.

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Q.3     How are simple tissues different from complex tissues in plants?
Sol.     Simple tissues are composed of similar cells, while complex tissues are composed of different types of cells.

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

Parechyma	Collenchyma	Sclerenchyma
Cell wall is thin.	Cell wall is thickened at corners.	Cell wall is thickened all around.

 

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Q.5     What are the functions of the stomata?
Sol.     Functions of stomata are as follows:
(a)  Exchange of gases
(b) Transpiration

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Q.6     Diagrammatically show the difference between the three types of muscle fibres.
Sol.
                 

Q.7     What is the specific function of the cardiac muscle?
Sol.     Cardiac muscles facilitate contraction and relaxation of heart; which results in pumping action of the heart.

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

Striated Muscles	Unstriated Muscles	Cardiac Muscles
Unbranched fibres; with striations.	Unbranched fibres; with striations.	Branched fibres with striations.
Present in voluntary organs.	Present in involuntary organs.	Present in the heart.

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Q.9     Draw a labelled diagram of a neuron.
Sol.

 

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Q.10     Name the following.

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

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Q.11     Identify the type of tissue in the following: skin, bark of tree, bone, lining of kidney tubule, vascular bundle.
Sol.       Skin: Epithelium, Bark of tree: Epidermis, Bone: Connective tissue, Lining of kidney tubule: Cuboidal Epithelium, Vascular bundle: Complex plant tissue

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Q.12     Name the regions in which parenchyma tissue is present.
Sol.       Parenchyma is present in mesophyll of leaves, fruits, flowers and young stem.

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Q.13     What is the role of epidermis in plants?
Sol.       Epidermis in plants provides protective covering to the underlying tissues. In xerophytes, epidermis has a waxy coating which prevents water loss.

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Q.14     How does the cork act as a protective tissue?
Sol.       Cork forms an impervious layer over underlying tissues. Cork prevents entry of water to the underlying tissue.

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Q.15     Complete the table:

 

Sol.

 

 

Exemplar

Multiple Choice Questions : –

Q.1 Which of the following tissues has dead cells?

(a) Parenchyma
(b) Sclerenchyma
(c) Collenchyma
(d) Epithelial tissue

Sol. (b)

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Q.2 Find out incorrect sentence
(a) Parenchymatous tissues have intercellular spaces
(b) Collenchymatous tissues are irregularly thickened at corners
(c) Apical and intercalary meristems are permanent tissues
(d) Meristematic tissues, in its early stage, lack vacuoles

Sol. (c)

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Q.3 Girth of stem increases due to
(a) apical meristem
(b) lateral meristem
(c) intercalary meristem
(d) vertical meristem

Sol. (b)

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Q.4 Which cell does not have perforated cell wall?
(a) Tracheids
(b) Companion cells
(c) Sieve tubes
(d) Vessels

Sol. (b)

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Q.5 Intestine absorb the digested food materials. What type of epithelial cells are responsible for that?
(a) Stratified squamous epithelium
(b) Columnar epithelium
(c) Spindle fibres
(d) Cuboidal epithelium

Sol. (b)

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Q.6 A person met with an accident in which two long bones of hand were dislocated. Which among the following may be the possible reason?
(a) Tendon break
(b) Break of skeletal muscle
(c) Ligament break
(d) Areolar tissue break

Sol. (c)

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Q.7 While doing work and running, you move your organs like hands, legs etc.
Which among the following is correct?
(a) Smooth muscles contract and pull the ligament to move the bones
(b) Smooth muscles contract and pull the tendons to move the bones
(c) Skeletal muscles contract and pull the ligament to move the bones
(d) Skeletal muscles contract and pull the tendon to move the bones

Sol. (d)

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Q.8 Which muscles act involuntarily?
(i) Striated muscles
(ii) Smooth muscles
(iii) Cardiac muscles
(iv) Skeletal muslces
(a) (i) and (ii)
(b) (ii) and (iii)
(c) (iii) and (iv)
(d) (i) and (iv)

Sol. (b)

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Q.9 Meristematic tissues in plants are
(a) localised and permanent
(b) not limited to certain regions
(c) localised and dividing cells
(d) growing in volume

Sol. (c)

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Q.10 Which is not a function of epidermis?
(a) Protection from adverse condition
(b) Gaseous exchange
(c) Conduction of water
(d) Transpiration

Sol. (c)

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Q.11 Select the incorrect sentence
(a) Blood has matrix containing proteins, salts and hormones
(b) Two bones are connected with ligament
(c) Tendons are non-fibrous tissue and fragile
(d) Cartilage is a form of connective tissue

Sol. (c)

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Q.12 Cartilage is not found in
(a) nose
(b) ear
(c) kidney
(d) larynx

Sol. (c)

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Q.13 Fats are stored in human body as
(a) cuboidal epithelium
(b) adipose tissue
(c) bones
(d) cartilage

Sol. (b)

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Q.14 Bone matrix is rich in
(a) fluoride and calcium
(b) calcium and phosphorus
(c) calcium and potassium
(d) phosphorus and potassium

Sol. (b)

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Q.15 Contractile proteins are found in
(a) bones
(b) blood
(c) muscles
(d) cartilage

Sol. (c)

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Q.16 Voluntary muscles are found in
(a) alimentary canal
(b) limbs
(c) iris of the eye
(d) bronchi of lungs

Sol. (b)

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Q.17 Nervous tissue is not found in
(a) brain
(b) spinal cord
(c) tendons
(d) nerves

Sol. (c)

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Q.18 Nerve cell does not contain
(a) axon
(b) nerve endings
(c) tendons
(d) dendrites

Sol. (c)

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Q.19 Which of the following helps in repair of tissue and fills up the space inside the organ?
(a) Tendon
(b) Adipose tissue
(c) Areolar
(d) Cartilage

Sol. (c)

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Q.20 The muscular tissue which function throughout the life continuously without fatigue is
(a) skeletal muscle
(b) cardiac muscle
(c) smooth muscle
(d) voluntary muscle

Sol. (b)

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Q.21 Which of the following cells is found in the cartilaginous tissue of the body?
(a) Mast cells
(b) Basophils
(c) Osteocytes
(d) Chondrocytes

Sol. (d)

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Q.22 The dead element present in the phloem is
(a) companion cells
(b) phloem fibres
(c) phloem parenchyma
(d) sieve tubes

Sol. (b)

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Q.23 Which of the following does not lose their nucleus at maturity?
(a) Companion cells
(b) Red blood cells
(c) Vessel
(d) Sieve tube cells

Sol. (a)

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Q.24 In desert plants, rate of water loss gets reduced due to the presence of
(a) cuticle
(b) stomata
(c) lignin
(d) suberin

Sol. (a)

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Q.25 A long tree has several branches. The tissue that helps in the side ways conduction of water in the branches is
(a) collenchyma
(b) xylem parenchyma
(c) parenchyma
(d) xylem vessels

Sol. (d)

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Q.26 If the tip of sugarcane plant is removed from the field, even then it keeps on growing in length. It is due to the presence of
(a) cambium
(b) apical meristem
(c) lateral meristem
(d) intercalary meristem

Sol. (d)

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Q.27 A nail is inserted in the trunk of a tree at a height of 1 metre from the ground level. After 3 years the nail will
(a) move downwards
(b) move upwards
(c) remain at the same position
(d) move sideways

Sol. (c)

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Q.28 Parenchyma cells are
(a) relatively unspecified and thin walled
(b) thick walled and specialised
(c) lignified
(d) none of these

Sol. (a)

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Q.29 Flexibility in plants is due to
(a) collenchyma
(b) sclerenchyma
(c) parenchyma
(d) chlorenchyma

Sol. (a)

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Q.30 Cork cells are made impervious to water and gases by the presence of
(a) cellulose
(b) lipids
(c) suberin
(d) lignin

Sol. (c)

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Q.31 Survival of plants in terrestrial environment has been made possible by the presence of
(a) intercalary meristem
(b) conducting tissue
(c) apical meristem
(d) parenchymatous tissue

Sol. (b)

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Q.32 Choose the wrong statement
(a) The nature of matrix differs according to the function of the tissue
(b) Fats are stored below the skin and in between the internal organs
(c) Epithelial tissues have intercellular spaces between them
(d) Cells of striated muscles are multinucleate and unbranched

Sol. (c)

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Q.33 The water conducting tissue generally present in gymnosperm is
(a) vessels
(b) sieve tube
(c) tracheids
(d) xylem fibres