NIOS Class 12 Biology Chapter 5 Solution – Tissues and other Level of Organization

NIOS Class 12 Biology Chapter 5 Solution – Tissues and other Level of Organization

NIOS Class 12 Biology Solution Chapter 5 Tissues and other Level of Organization . NIOS Class 12 Biology Chapter 5 Question Answers Download PDF. NIOS Class 12 Biology Notes.

NIOS Class 12 Biology Chapter 5 Solution

Board

NIOS
Class

12th (Higher Secondary)

Subject

Biology
Topic

Question Answer, Solution, Notes

INTEXT 5.1

1.) Define a tissue.

Ans: bodies of organisms are made up of cells of various shapes and sizes. Groups of similar cells aggregate to collectively perform a particular function.

Such groups of cells are termed “tissues”. A tissue is a group of cells with a common origin, structure and function.

2.) Give one word equivalent for the following :

(i)A plant tissue that consists of cells which continue to divide to produce more cells.

Merisematic;

(ii) The meristematic tissue responsible for the increase in thickness of the stem of a tree. .- Lateral meristem

(iii) The kind of plant tissues which consists of all similar cells.- Simple

(iv) The category of plant tissues in which the cells do not divide. – Permanent.

3.) What do you mean by “cells of a tissue have similar origin”?.

Ans: A tissue is a group of cells with a common origin, structure and function. Their common origin means they are derived from the same layer of cells in the embryo. Being of a common origin, there are similar in structure and hence perform the same function.

4.) Name that branch of Biology in which tissues are studied?

Ans: Branch of Biology in which tissues are studied is called Histology

5.) What is a complex tissue?

Ans: A complex tissue is made up of more than one type of cells working together as a unit. Common examples of complex tissue  are xylem and phloem.

6.) Mention any two special features of the meristematic cells.

Ans: Meristematic tissues are Composed of immature or undifferentiated cells without intercellular space , .

– The cells may be rounded, oval or polygonal; always living and thin-walled.

– Each cell has abundant cytoplasm and a prominent nucleus in it

INTEXT 5.2

1.) Give Two characteristics and one example of the location of the given tissues in plants in the following table:

Sr No. Tissue Characteristics Example of Location
1. Parenchyma 1. Round cells

2. Living

1. Root, stem and leaves
2. Collenchyma 1. Polygonal cells

2. Living

1. Petiole and Mid-rib of with thickening leaves at corners
3. Sclerenchyma 1. Elongated .

2. Dead and thick walled

 1.Woody Stems irregular in shape

2.) Name the plant tissues which

(i) conduct water – Xylem

(ii) conduct food metabolites- . Phloem

INTEXT .5.3

1.) List the different types of animal tissues

Ans: (i) Epithetial tissue

(ii) Connective Tissue

(iii) Muscular tissue

(iv) Nervous Tissue

2.)  Match the items in Column I with those in Column II by writing the corresponding serial number within brackets.

Column 1 Column 2 (Ans.)
 (a)Compound Epithelium (i) Epithelial tissue
(b) Basement membrane (ii) For increasing the surface area
(c) Brush-bordered epithelium (iii) Lining of trachea
(d) Salivary gland (iv) Skin
(e) Ciliated Epithelium (v) Cuboidal epithelium

INTEXT 5.4

1.) Name the different types of cells found in the different types of connective tissue.

Ans:  The different types of cells found in the different types of connective tissue are as follow:

(I )Firbroblasts – areolar

(ii) Macrophages – areolar

(iii) Mast cells – areolar

(iv) Cartilage cells/chondrocyte – chondrocyte-cartilage

(v) Bone cells/osteocyte – bone

(vi) Blood cells/WBC RBC – blood

2.) Match the item in Column I with those in Column II, by writing the corresponding serial number within brackets:

Coulum 1 Column 2(Ans.)
Unstripped muscles (v) involuntary
Myofibrils (ii) run parallel to each other in a striped muscle
c. Sarcolemma (iv) outer tough membrane of a striped muscle fibre
Striped muscle (i) multinucleate
Branched myofibrils (iii) cardiac muscles

INTEXT 5.5

1.) What is the function of the nervous tissue?

Ans:. Nervous tissues is a sensory organ which  constitute the brain, spinal cord, nerves and the sensory cells and sense organs

2.) What is the direction of the “flow of impulse” within a nerve cell from its dendrites to its axon end or from its axon end toward its dendrites?

Ans:. The  direction of the “flow of impulse” within a nerve cell is  from Dendrite to the axon.

3.) What are the following parts in a nerve cell?

(i) Cyton  – Cell Body

(ii) Dendrite- Thin processess of cyton

(iii) Axon  – sensory fibre

(iv) Medullary sheath – medullary layer

(v) Node of Ranvier – interruptions in medullary sheath

INTEXT 5.6

1.) Rearrange the following levels of organizations in their correct sequences:- tissue, cell, organ, organism, organ system..

Ans: The levels of organization are Cell, tissue, organ, organ system, organism

2.) Complete the following Table by giving one example of each of the following in an animal and plant.

Ans:

Level of Organization Animal Plant
Cell white blood cells Green cells of a leaf
Tissue surface epithelium of our skin or the dividing cells at the root cap of a plant. Tthe dividing cells at the root cap of a plant.
Organ Liver in animals  leaf in plants
Organ system Respiratory system Shoot system
Organism Monkey Mustard plant
Updated: September 12, 2023 — 4:58 pm

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