Solution of Chapter 6. Tissues (NCERT Science Exemplar Book)

Which of the following tissues has dead cells?

Find out incorrect sentence

Girth of stem increases due to

Which cell does not have a perforated cell wall?

Intestine absorbs the digested food materials. What type of epithelial cells are responsible for that?

A person met with an accident in which two long bones of hand were dislocated. Which among the following may be the possible reason?

While doing work and running, you move your organs like hands, legs etc.

Which among the following is correct?

Which muscles act involuntarily?

(i) Striated muscles

(ii) Smooth muscles

(iii) Cardiac muscles

(iv) Skeletal muscles

Meristematic tissues in plants are

Which is not a function of the epidermis?

Select the incorrect sentence

Cartilage is not found in

Fats are stored in human body as

Bone matrix is rich in

Contractile proteins are found in

Voluntary muscles are found in

Nervous tissue is not found in

Nerve cell does not contain

Which of the following helps in repair of tissue and fills up the space inside the organ?

The muscular tissue which function throughout the life continuously without fatigue is

Which of the following cells is found in the cartilaginous tissue of the body?

The dead element present in the phloem is

Which of the following does not lose their nucleus at maturity?

In desert plants, rate of water loss gets reduced due to the presence of

A long tree has several branches. The tissue that helps in the sideways conduction of water in the branches is

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 nail is inserted in the trunk of a tree at a height of 1 meter from the ground level. After 3 years the nail will-

Parenchyma cells are

Flexibility in plants is due to

Cork cells are made impervious to water and gases by the presence of

Survival of plants in terrestrial environment has been made possible by the presence of

Choose the wrong statement

The water conducting tissue generally present in gymnosperm is

Animals of colder regions and fishes of cold water have thicker layer of subcutaneous fat. Describe why?

Match the column (A) with the column (B)

Match the column (A) with the column (B)

If a potted plant is covered with a glass jar, water vapors appear on the wall of glass jar. Explain why?

Name the different components of xylem and draw a living component?

Draw and identify different elements of phloem.

Write true (T) or false (F)

(a) Epithelial tissue is protective tissue in animal body.

(b) The lining of blood vessels, lung alveoli and kidney tubules are all made up of epithelial tissue.

(c) Epithelial cells have a lot of intercellular spaces.

(d) Epithelial layer is permeable layer.

(e) Epithelial layer does not allow regulation of materials between body and external environment.

Differentiate between voluntary and involuntary muscles. Give one example of each type.

Differentiate the following activities on the basis of voluntary (V) or involuntary (I V) muscles.

(a) Jumping of frog

(b) Pumping of the heart

(c) Writing with hand

(d) Movement of chocolate in your intestine

Fill in the blanks

(a) Lining of blood vessels is made up of ________

(b) Lining of small intestine is made up of ________

(c) Lining of kidney tubules is made up of ________

(d) Epithelial cells with cilia are found in ________ of our body.

Water hyacinth float on water surface. Explain.

Which structure protects the plant body against the invasion of parasites?

Fill in the blanks

(a) Cork cells possesses ______ on their walls that makes it impervious to gases and water.

(b) _______ have tubular cells with perforated walls and are living in nature.

(c) Bone possesses a hard matrix composed of _______ and ______ .

Why is epidermis important for the plants?

Fill in the blanks

(a) ______ are forms of complex tissue.

(b) ______ have guard cells.

(c) Cells of cork contain a chemical called______

(d) Husk of coconut is made of______ tissue.

(e) ______ gives flexibility in plants.

(f) ______ and ______ are both conducting tissues.

(g) Xylem transports ______ and ______from soil.

(h) Phloem transport ______ from ______ to other parts of the plant.

Differentiate between sclerenchyma and parenchyma tissues. Draw well labelled diagram.

Describe the structure and function of different types of epithelial tissues. Draw diagram of each type of epithelial tissue.

Draw well labelled diagrams of various types of muscles found in human body.

Give reasons for

(a) Meristematic cells have a prominent nucleus and dense cytoplasm but they lack vacuole.

(b) Intercellular spaces are absent in sclerenchymatous tissues.

(c) We get a crunchy and granular feeling, when we chew pear fruit.

(d) Branches of a tree move and bend freely in high wind velocity.

(e) It is difficult to pull out the husk of a coconut tree.

List the characteristics of cork. How are they formed? Mention their role.

Why xylem and phloem are called complex tissues? How are they different from one other?

Differentiate between meristematic and permanent tissues in plants

Define the process of differentiation

Name any two simple and two complex permanent tissues in plants.