chapter - 5 Histology And Life Processes

Question 1

define cell

Answer 1

Cell is a protoplasm surrounded by cell membrane, which is structural and functional unit of life.

Question 2

Define tissue

Answer 2

Tissue is a group of similar cells which together performs certain task or functions.

Question 3

Types of tissue

Answer 3

• Plant tissue
• Animal Tissue

Question 4

definePlant tissue
(Meristematic and Permanent tissue.)

Answer 4

Plant tissue are the group of plant cells that have similar structure and fucntion.

Question 5

define Meristematic tissue

Answer 5

Meristematic tissues are the group of active cells that have the capacity of active cell division.
These cells are responsible for growth of plant.
- Apical meristem
- Lateral meristem
- Intercalary meristem

Question 6

Define apical meristem with its function.

Answer 6

Apical meristem are the type of meristematic tissue that are located at the growing points of plant i.e. root and shoot of plants.
These meristematic tissue are responsible for growth of height of plant.

Question 7

Define Lateral meristem with its function.

Answer 7

Lateral meristem are the type of meristematic tissue that is responsible for the the growth of grith or diameter of the plant. They are laterally located.

Question 8

Define Intercalary meristem with its function.

Answer 8

Intercalary meristem are the type of meristem that are located between the permanent tissues and apical meristem which are responsible for the growth of length of axis plants.

Question 9

Define permanent tissue.

Answer 9

Permanent tissue are the group of plant cells that don’t have the ability of active cell division and are differentiated to carry out different functions of plant.

Question 10

Types of permanent tissue.

Answer 10

• Simple permanent tissue
• Complex permanent tissue
• Special permanent tissue

Question 11

Simple permanent tissue

Answer 11

-Parenchyma
-Collenchyma
-Sclerenchyma

Question 12

Short note about Parencyma

Answer 12

Parenchyma consists of thin-walled living cells usually of oval or spherical shape.
These are responsible for producing and storing food.

Question 13

Short note on Collenchyma

Answer 13

Collenchyma is the cells with extra deposition of cellulose at the corner of the cell.
1. Collenchyma supports plasticity and elasticity.
2. Collenchyma contains chloroplast which is responsible for photosynthesis.
3. Collenchyma resists the tearing effect of the wind due to its presence in the margin.

Question 14

Short note on Sclerenchyma.

Answer 14

Sclerenchyma are the dead cells with cell wall. It is mainly responsible for providing mechanical strength to plant.

Question 15

Complex permanent tissues.
- Xylem
- Phloem

Answer 15

xylem - it transports water and minerals from root to leaves
phloem - it transports food from leaves to different parts of plant

Question 16

special permanent tissue :
lactiferous tissues
glandular tissues

Answer 16

Lactiferous tissues: They are thin-walled, elongated and branched duct which contain milky juice called latex. They are responsible for food storage or waste products.

Glandular tissues:
They secrete digestive enzymes.