Question

Q3- Function of the followings:
(i) Apical meristem
(ii) Xylem
(iii) Tendons
(iv) Blood
(v) Histamine​

Answer 1

Answer:

. What is a tissue?

Ans. A group of cells that are similar in structure and work together to do a peculiar function is called tissue.

2. What is the utility of tissues in multicellular organisms?

Ans. Tissues provide structural strength, mechanical strength, show division of labour.

NCERT Textbook Page 74

1. Name types of simple tissues.

Ans. The types of simple tissues are parenchyma, collenchyma, sclerenchyma and aerenchyma.

2. Where is apical meristem found?

Ans. Apical meristem is found at the tip of root or shoot of the plant.

3. Which tissue makes up the husk of coconut?

Ans. The husk of coconut is made of sclerenchymatous tissue.

4. What are the constituents of phloem?

Ans. Phloem is made up of four types of elements sieve tube, companion cells, phloem fibres and phloem parenchyma.

NCERT Textbook Page 78

1. Name the tisswe responsible for movement in our body.

Ans. 1. Muscular tissue, 2. Nervous tissue, combination of both the tissues are responsible for movement in our body.

2. What does a neuron look like?

Ans. A neuron consists of a cell body with a nucleus and cytoplasm, from which long thin hair like parts arise. Each neuron has a single long part called the axon, and many small, short branched parts called dendrite. An individual nerve cell is called neuron, it may be upto a metre long.