PLANT AND ANIMAL TISSUE
Chapter - 1
(Class 7 - Concise
Biology Selina)
Multiple
Choice Questions
Question 1
A group of similar cells that perform a specific function
forms a:
- organ
- species
- organ system
- tissue
Answer
tissue
Reason —
Similar cells organize to form tissue and perform a specific function.
Question 2
The small fine branches given out from the cell body of a
nerve cell are:
- dendrites
- cyton
- axon
- neurons
Answer
dendrites
Reason —
Dendrites are fine hair-like extensions from cyton.
Question 3
The fluid connective tissue of humans is:
- blood and cartilage
- lymph and plasma
- blood and lymph
- stroma and matrix
Answer
blood and lymph
Reason —
Blood (cells+plasma) and Lymph are the fluid connective tissue that is
concerned with the transportation of oxygen, glucand amino acids, etc.
PLANT AND ANIMAL
TISSUE hapter - 1 (Class 7 - Concise Biology Selina) ICSE
Classification
of Plants Chapter 2 (Class 7 - Concise
Biology Selina) ICSE
Classification
of Animals - Chapter 3 Class 7 - Concise Biology Selina ICSE
Photosynthesis
and Respiration- Chapter 4 (Class 7 -
Concise Biology Selina) ICSE
Excretion in
Humans - Chapter 5 (Class 7 - Concise Biology Selina) ICSE
Nervous System-
Chapter 6 (Class 7 - Concise Biology Selina)
ICSE
Allergy- Chapter
7 (Class 7 - Concise Biology Selina)
ICSE
Short Answer
Questions
Question 1
Define the following terms:
(i) Tissue
(ii) Organ
Answer
(i) Tissue — A group of similar cells that are specialized
to perform a specific function is known as tissue. For example muscle tissue, and skin tissue.
(ii) Organ — A differentiated structure formed by a group of
similar tissues, which is specialized to perform a specific function is called
an organ.
Question 2
Answer the following:
(i) What is meristematic tissue? How is it different from
permanent tissues?
(ii) Which living material would you take to demonstrate
meristematic tissue?
(iii) What is the function of meristematic tissue?
Answer
(i) The
actively dividing cells found at all the growing points in a plant like the tip
of roots, stems, and branches, are known as meristematic tissue. Their role is to
divide and produce more cells leading to the growth of the plant body.
They are different from the permanent tissues in the following
ways:
- The cells of meristematic tissue are sm as
compared to cells of permanent tissue.
- They have thin cell walls as compared to permanent
tissues.
- Meristematic cells have large and conspicuous nuclei
whereas permanent cells have small nuclei.
- Vacuoles are absent in meristematic cells while large
vacuoles can be seen in permanent cells.
- The cells of meristematic tissue actively divide to add
new cells whereas cells of permanent tissue do not divide.
(ii) Green
gram seeds are useful for showing meristematic tissue. When soaked, these seeds
sprout quickly. The tips of their roots contain meristematic tissue that helps
in their growth.
(iii) The main job of meristematic tissue is to create new
cells, which helps the plant grow. Both the height and thickness of the stem
increase because of these tissues,
.Question 3
State whether
the following statements are True or False.
(i) A tissue is formed of only one type of cell.
(ii) Only one type of tissue forms an organ.
(iii) Permanent tissue is made up of undifferentiated and
dividing cells.
(iv) Meristematic tissue is found at the growing tips of a
plant.
(v) Phloem is formed of dead tubular cells.
Answer
(i) True
(ii) True
(iii) False
Corrected statement — Permanent tissue is made up of
differentiated and non-dividing cells.
(iv) True
(v) False
Corrected statement — Phloem is formed of living tubular
cells.
Question 4
Fill in the
blanks by selecting suitable words from the list given below:
[thin-walled, collenchyma, vascular, tissues, conducting]
(i) A group of different ............... working together to
perform a function is called an organ.
(ii) Xylem and phloem form the ............... tissue.
(iii) Conducting tissue is also called ...............
tissue.
(iv) Cells are elongated and thick at the corners in
............... tissue.
(v) Parenchyma is composed of large ............... cells.
Answer
(i) A group of different tissues working together to perform a function is
called an organ.
(ii) Xylem and phloem form the conducting tissue.
(iii) Conducting tissue is also called vascular tissue.
(iv) Cells are elongated and thick at the corners of collenchyma tissue.
(v) Parenchyma is composed of large thin-walled cells.
Question 5
Match the
items given in Column A with those given in Column B:
|
Sl. |
Column A |
Column B |
|
(i) |
Fibrous connective tissue |
(a) blood |
|
(ii) |
Fluid connective tissue |
(b) cartilage |
|
(iii) |
Supportive connective tissue |
(c) connects a bone to another bone |
|
(iv) |
Ligament |
(d) areolar tissue |
|
(v) |
Tendon |
(e) connects a muscle with a bone |
Answer
|
Sl. |
Column A |
Column B |
|
(i) |
Fibrous connective tissue |
(d) areolar tissue |
|
(ii) |
Fluid connective tissue |
(a) blood |
|
(iii) |
Supportive connective tissue |
(b) cartilage |
|
(iv) |
Ligament |
(c) connects a bone to another bone |
|
(v) |
Tendon |
(e) connects a muscle with a bone |
Question 6
How do you rank the following concerning a cell,
tissue, organ, or organism?
(i) Amoeba (ii) Euglena (iii) Skin (iv) Lungs (v) Neurons
(vi) Cardiac muscles
Answer
(i) Amoeba: Organism (unicellular)
(ii) Euglena: Organism (unicellular)
(iii) Skin: Organ
(iv) Lungs: Organ
(v) Neurons: Cell
(vi) Cardiac muscles: Tissue
Question 7
Each of the tissues listed in Column A is related to one of
the functions given in Column B. Match the correct pairs by drawing lines.
|
Sl. |
Column A |
Column B |
|
(i) |
Epithelial tissue |
(a) movement |
|
(ii) |
Connective tissue |
(b) protection |
|
(iii) |
Vascular tissue |
(c) messages |
|
(iv) |
Nervous tissue |
(d) support |
|
(v) |
Muscular tissue |
(e) transport |
Answer
|
Sl. |
Column A |
Column B |
|
(i) |
Epithelial tissue |
(b) protection |
|
(ii) |
Connective tissue |
(d) support |
|
(iii) |
Vascular tissue |
(e) transport |
|
(iv) |
Nervous tissue |
(c) messages |
|
(v) |
Muscular tissue |
(e) movement |
Question 8
Name the kind of tissue that
(i) Carries oxygen around your body
(ii) Brings about movement in animals
(iii) Transports food to different parts of a plant
(iv) Transports water in plants
(v) Supports an animal's body
(vi) Binds different tissues together
(vii) Conducts messages from one part of the body to another
Answer
(i) Carries oxygen around your body — Fluid connective tissue
(ii) Brings about movement in animals — Muscular tissue
(iii) Transports food to different parts of a plant — Phloem
(iv) Transports water in plants — Xylem
(v) Supports an animal's body — Supportive connective tissue
(vi) Binds different tissues together — Fibrous connective tissue
(vii) Conducts messages from one part of the body to another
— Nervous tissue
Question 9
Based on the following information, identify the three types
of epithelial tissue in the figures given below:
(i) Cuboidal epithelium: It consists of a single layer of
cuboidal cells.
(ii) Columnar epithelium: It is composed of tall,
cylindrical cells with oval nuclei usually placed at the base of the cells.
(iii) Ciliated epithelium: It consists of cells bearing
hair-like cilia on their free surface.
(a) ..............
(b) ..............
(c) ..............Answer
(a) Cuboidal epithelium
(b) Columnar epithelium
(c) Ciliated epithelium
Question 10
Write three differences between the two principal vascular
tissues found in plants.
Answer
Two principal vascular tissues found in plants are Xylem and
Phloem. Three differences between them are as follows:
|
Xylem |
Phloem |
|
1. Transports water and minerals absorbed by the roots to
other plant parts. |
1. Transports food manufactured in the leaves to other
plant parts. |
|
2. Consists mainly of dead cells. |
2. Consists mainly of living cells. |
|
3. Conduction is unidirectional i.e. only upwards from the
roots. |
2. Bidirectional conduction i.e. both upwards and
downwards from the leaves. |
Question 11
Mention the main characteristic features of meristematic
tissues and state where we find such tissues in plants. Give the function of
the meristematic tissue.
Answer
The main characteristic features of meristematic tissues
are:
- The cells are small.
- The cell walls are thin.
- The nuclei are large and conspicuous.
- The cells are almost without vacuoles.
- The cells actively divide to add new cells.
Meristematic tissues are found at all growing points in a
plant, like the tip of roots, stems, and branches, where growth in length
occurs. The growth in the thickness of the stem is also due to meristematic
tissues.
The function of the meristematic tissues is to produce more
cells leading to the growth of the plant body.
Question 12
Name the plant tissue which helps in the movement of water
and minerals in the body. What are the various types of cells present in this
tissue?
Answer
The xylem is
the plant tissue that helps in the movement of water and minerals in the plant
body.
The xylem is formed of thick-walled, tubular, and often dead
cells. The various types of cells present in Xylem tissue are:
- Tracheids.
- Vessels.
- Xylem parenchyma.
- Xylem fibers.
Question 13
Which plant tissue is responsible for the distribution of food
prepared in the leaves? Name the four component parts of this tissue.
Answer
The phloem is
the plant tissue that is responsible for the distribution of food prepared in the
leaves.
The four component parts of this tissue are:
- Sieve tubes
- Companion cells
- Phloem parenchyma
- Phloem fibers
Question 14
Name the various types of animal tissue and state their
functions.
Answer
The various types of animal tissue and their functions are
as follows:
- Epithelial Tissue —
It covers the surface of the body and forms the lining of various body
cavities and internal organs.
- Connective Tissue —
This tissue connects various other tissues and organs, as well as provides support to different organs to keep them in the proper position.
- Muscular Tissue —
It forms the muscles of arms, legs, heart, alimentary canal, etc., that
contract and relax. They help in movements and locomotion.
- Nervous Tissue —
This tissue is made up of elongated cells called neurons. Their function
is the transmission of messages to the brain and back to body parts.
Question 15
Give the structure and function of different types of
epithelial tissues.
Answer
There are four types of epithelial tissues:
- Squamous epithelium —
They are composed of thin, flattened, and polygonal cells. For example:
Cells of the outer layer of skin. These cells are usually protective.
- Cuboidal epithelium —
They are composed of cube-like cells. For example: The inner wall lining of
kidney tubules is concerned with absorption.
- Columnar epithelium —
They are composed of vertically arranged, tall, cylindrical, or column-like
cells. For example The inner lining of the stomach and intestine. These cells are
usually secretory.
- Ciliated epithelium —
The columnar epithelium develops cilia at some places like the lining of the wind
pipe and oviduct. The cilia keep lashing and moving the substances in its
contact.
Question 16
Draw the diagram of a neuron and label the following parts
in it: Cyton, axon, node of Ranvier, and internode.
Answer
Question 17
Name the three main kinds of muscular tissues. Give the
exact location of each kind in an animal body.
Answer
The three main kinds of muscular tissues are:
- Striated Muscles —
They are attached to the bones. They can be found in the arms, legs, face neck, etc.
- Unstriated muscles —
Common places where these muscles can be found are in the intestinal walls,
muscles of the iris in the eye, in the wall of the urinary bladder.
- Cardiac Muscles —
They are found only in the walls of the heart.
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