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
12th (Higher Secondary)
Question Answer, Solution, Notes
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.
(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
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
|1. Root, stem and leaves|
|2.||Collenchyma||1. Polygonal cells
|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
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|
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|
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
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.
|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|