Question 1

Question 1Define the term "tissue".

Accepted Answer

A group of structurally and functionally similar cells performing a particular function is called a tissue.

Question 2

Question 2How many types of elements together make up the xylem tissue? Name them.

Accepted Answer

Four types of elements together make up the xylem tissue. They are:Tracheids — They are thick walled and tubular dead cells. They transport water and mineral.Vessels — They are tubular cells and transport water and mineral.Xylem parenchyma — They store food.Xylem fibres — They are supportive in function.

Question 3

Question 3How are simple tissues different from complex tissues in plants?

Accepted Answer

Simple tissuesComplex tissuesSimple tissues are made up of only one type of cell.Complex tissues are made up of more than one type of cells.Simple tissue helps in storage and provides structural support.The main role of complex tissue is transportation.Example : Parenchyma, Collenchyma, SclerenchymaExamples : Xylem and Phloem

Question 4

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

Accepted Answer

ParenchymaCollenchymaSclerenchymaThin cell wallCell wall with thickening at cornersVery thick lignified cell wall

Question 5

Question 5What are the functions of the stomata?

Accepted Answer

Following are the functions of the stomata:Exchange of gases with the atmosphere occur through stomata.Transpiration (loss of water in the form of water vapour) also takes place through stomata.

Question 6

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

Accepted Answer

Striated muscleSmooth muscleCardiac muscleShow alternate light and dark bands or striationsDo not show striationsStriation are presentLong, cylindricalLong with pointed ends (spindle-shaped)CylindricalUnbranchedBranchedBranchedMultinucleateUninucleateUninucleate

Question 7

Question 7What is the specific function of the cardiac muscle?

Accepted Answer

The specific function of the cardiac muscle is to contract and expand. They show rhythmic and involuntary contraction and relaxation throughout life enabling the heart to beat and pump blood to all parts of the body.

Question 8

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

Accepted Answer

striated musclesunstriated musclescardiac musclesStructurecylindrical, unbranched and multinucleate with light and dark bandscells are long with pointed ends (spindle-shaped) and uninucleatecylindrical, branched and uninucleatelocationSkeletal musclesOesophagus, iris of the eye, in ureters and in the bronchi of the lungsHeart

Question 9

Question 9Draw a labelled diagram of a neuron.

Accepted Answer

Labelled diagram of a neuron is shown below:

Question 10

Question 10Name 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 fluid matrix.(f) Tissue present in the brain.

Accepted Answer

(a) Squamous epithelium(b) Tendons(c) Phloem(d) Adipose tissue(e) Blood(f) Nervous tissue

Question 11

Question 11Identify the type of tissue in the following: skin, bark of tree, bone, lining of kidney tubule, vascular bundle.

Accepted Answer

Skin — epithelial tissuesBark of tree — cork (formed by secondary meristem)Bone — Connective tissue (Bone cells are embedded in a hard matrix that is composed of calcium and phosphorus compounds.)Lining of kidney tubule — Cuboidal epithelium (with cube-shaped cells)Vascular bundle — Xylem and phloem (Complex permanent tissue)

Question 12

Question 12Name the regions in which parenchyma tissue is present.

Accepted Answer

The parenchyma tissue can be found in the leaf, fruits, as well as flowers. It is located beneath the epidermis.

Question 13

Question 13What is the role of epidermis in plants?

Accepted Answer

The primary role of epidermis in plants is protection. The entire surface of a plant has an outer covering epidermis. It protects all the parts of the plant. Epidermal cells on the aerial parts of the plant often secrete a waxy, water resistant layer on their outer surface. This aids in protection against:loss of watermechanical injuryinvasion by parasitic fungi

Question 14

Question 14How does the cork act as a protective tissue?

Accepted Answer

A strip of secondary meristem located in the cortex forms layers of cells which constitute the cork. Cells of cork are dead and compactly arranged without intercellular spaces. They also have a substance called suberin in their walls that makes them impervious to gases and water. This is how cork act as a protective tissue protecting the plants from any physical or mechanical injuries and pathogenic infection.

Question 15

Question 15Complete the following chart:

Accepted Answer

The completed chart is shown below:

Question 16

Question 1What is a tissue?

Accepted Answer

A group of structurally and functionally similar cells performing a particular function is called a tissue.

Question 17

Question 2What is the utility of tissues in multi-cellular organisms?

Accepted Answer

A group of cells that are similar in structure and/or work together to achieve a particular function forms a tissue. In multi-cellular organisms, tissues provide structural and mechanical strength and enables the division of labour. In such organisms, many tissues work together to form an organ and then an organ system.

Question 18

Question 1Name types of simple tissues.

Accepted Answer

Types of simple tissue are:ParenchymaCollenchymaSclerenchyma

Question 19

Question 2Where is apical meristem found?

Accepted Answer

Apical meristem is present at the growing tips of stems and roots.

Question 20

Question 3Which tissue makes up the husk of coconut?

Accepted Answer

The husk of coconut is made of sclerenchymatous tissue.

Tissues

Exercises

Intext Questions 1

Intext Questions 2

Intext Questions 3