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Tissue : NCERT Exercise Questions


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


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.


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.


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.

 


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


Q.6     Diagrammatically show the difference between the three types of muscle fibres.
Sol.
101         20        30

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.


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.

Q.9     Draw a labelled diagram of a neuron.
Sol.
40

 


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


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


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


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.


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.


Q.15     Complete the table:

50

 

Sol.

 

60



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