Tissues & Others Level of Organization : 12th Class Biology Question Answer Lesson 5 – NIOS
INTEXT QUESTIONS 5.1
- Define a tissue.
Ans. a group of cells with similar origin, structure and function - 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 - What do you mean by “cells of a tissue have similar origin”?
Ans. arising from same embryonic layer of cells - Name that branch of Biology in which tissues are studied?
Ans. Histology - What is a complex tissue?
Ans. composed of more than one type of cells all cooperating in performing common function - Mention any two special features of the meristematic cells.
Ans. >> 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 QUESTIONS 5.2
- Give Two characteristics and one example of the location of the given tissuesin plants in the following table:
| S. No. | Tissues | Characteristics | Example of location |
|---|---|---|---|
| 1. | Parenchyma | 1. Round cells 2. Living | Root, stem and leaves |
| 2. | Collenchyma | 1. Polygonal cells with thickenings at corners. 2. Living | Petiole and Mid-rib of leaves |
| 3. | Sclerenchyma | 1. elongated and irregular in shape 2. Dead and thicked walled | Woody Stems |
- Name the plant tissues which
(i) conduct water – Xylem
(ii) conduct food metabolites – Phloem
INTEXT QUESTIONS 5.3
- List the different types of animal tissues
Ans. Epithelial, connective, muscular, nervous - Match the items in Column I with those in Column II by writing the
corresponding serial number within brackets.
Column I Column II
(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
Ans. a-iv, b-i, c-ii, e-iii
INTEXT QUESTIONS 5.4
- Name the different types of cells found in the different types of connective tissue.
Ans. Firbroblasts – areolar
Macrophages – areolar
Mast cells – areolar
Cartilage cells / chondrocyte –chondrocyte-cartilage
Bone cells/osteocyte – bone
Blood cells/WBC RBC – blood - Match the item in Column I with those in Column II, by writing the
corresponding serial number within brackets:
Column I Column II
a. Unstripped muscles ( ) (i) multinucleate
b. Myofibrils ( ) (ii) run parallel to each other in a striped
muscle
c. Sarcolemma ( ) (iii) cardiac muscles
d. Striped muscle ( ) (iv) outer tough membrane of a striped muscle
fibre
e. Branched myofibrils ( ) (v) involuntary
Ans. a (v); (b) (ii); c (iv); d (i); e. (iii)
INTEXT QUESTIONS 5.5
- What is the function of the nervous tissue?
Ans. Sensory - 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. Dendrite to the axon - What are the following parts in a nerve cell?
(i) Cyton – cell-body
(ii) Dendrite – thin processes of cyton
(iii) Axon – Sensory Fibre
(iv) Medullary sheath – medullary layer
(v) Node of Ranvier – interruptions in medullary sheath
INTEXT QUESTIONS 5.6
- Rearrange the following levels of organizations in their correct sequences:-
tissue, cell, organ, organism, organ system.
Ans. Cell, tissue, organ, organ system, organism
NIOS 12th class biology Q Ans
- Origin and Evolution of Life & Classification : 12th Class Biology Notes – NIOS
- The Kingdoms Monera, Protista & Fungi : 12th Class Biology Notes – NIOS
- Kingdoms Plantae & Animalia : 12th Class Biology Question Answer Lesson 3 – NIOS
- Cell Structure & Function : 12th Class Biology Question Answer Lesson 4 – NIOS
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