Selina Concise Class 7 Biology Solution Chapter No. 1- ‘Plant and Animal Tissues’ For ICSE Board Students.
Multiple Choice Question
1.) Put a tick against the most appropriate alternative in the following statements.
(i) A group of similar cells to perform a specific function forms a …………….
(a) Organ (b) Species (c) organ system (d) Tissue
Answer is D. It is called as tissue because all cells come together and make a structure called tissue.
(ii) The small fine branches given out from the cell body of a nerve cell are …………
(a) Dendrites (b) Cyton (c) Axon (d) Neuron
Answer is A. These dendrites are hair like extensions arise from cell body.
(iii) Fluid connective tissue of human is…………
(a) blood and cartilage (b) lymph and plasma (c) blood and lymph (d) stroma and matrix
Answer is C. Because others are fibrous and supportive tissues.
Short Answer Question
1.) Define the following terms :
(i) Tissue : It can be defined as a group of cells forms a unique structure and performs a specific function called as tissue.
(ii) Organ : When group of cells come together it is called tissues and the bunch of tissues make a structure and plays an important role called as organ. For example : Heart and brain.
2.) Answer the following.
(i) What is meristematic tissue ? How is it different from a permanent tissues ?
Answer: The meristematic tissues responsible for growth of large number of cells, they are present at the tip of the plant and increases the size and diameter of root and stem. They are also called as actively dividing cells.
(ii) Which living material would you take to demonstrate meristematic tissue ?
Answer: The overnight soaked green gram seeds such as moong can be used to demonstrate meristematic tissue as the overnight soaked green gram seeds can be sprouted that is sprouts will ooze out outside, which can be demonstrated as growth.
(iii) What is the function of meristematic tissue ?
Answer : Meristematic tissue plays role in increasing the height, size and diameter of the organs of the plants such as roots, stem and leaves by producing new cells.
3.) State whether the following statements are true or false.
(i) A tissue is formed of only one type of cells.
Answer: True
(ii) Only one type of tissue forms an organ.
Answer: False, more than one tissues can form organ.
(iii) Permanent tissue is made up of undifferentiated and dividing cells.
Answer: False, It is meristematic tissue, made up of undifferentiated and dividing cells.
(iv) Meristematic tissue is found at the growing tips of a plant.
Answer: True.
(v) Phloem is formed of dead tubular cells.
Answer: False, phloem formed from living cells.
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.
Answer: Tissues
(ii) Xylem and phloem form the ———- tissues.
Answer: Conducting
(iii) Conducting tissue is also called———– tissues.
Answer: Vascular
(iv) Cells are elongated and thick at the corners in ———– tissue.
Answer: Collenchyma
(v) Parenchyma is composed of large——— cells.
Answer: Thin walled
5.) Match the items given in column A with those given in column B.
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:
Column A Answer
(i) Fibrous connective tissue (d) Areolar tissue
(ii) Fluid connective tissue (a) Blood
(iii) Supportive connective tissue (b) Cartilage
(iv) Ligament (e) Connects a muscle with a bone
(v) Tendon (c) Connects a bone to another bone
6.) How do you rank the following with respect to a cell , tissue, organ or organism ?
(i) Amoeba : Organism
(ii) Euglena : Organism
(iii) Skin: Organ
(iv) Lungs: Organ
(v) Neuron: cell
(vi) Cardiac muscles :Tissue
7.) Each of the tissue listed in Column A is related to one of the functions given in Column B. Match the correct pairs.
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
Column A Answer
(i) Epithelial tissue (b) Protection
(ii) Connective tissue (d) Support
(iii) Vascular tissue (e) Transport
(iv) Nervous tissue (c) Messages
(v) Muscular tissue (a) Movement
8.) Name the kind of tissue that.
(i) Carries oxygen around your body- Blood 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- Connective tissue
(vi) Binds different tissues together- Fibrous Connective tissue
(vii) Conducts messages from one part of the body to another- Nervous tissue
9.) Based on the following information, identify the three types of epithelial tissue in the figures given below :
(i) Cuboidal epithelium : It consist 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.
Answer: A. Cuboidal epithelium B. Columnar epithelium C.Ciliated epithelium
10.) Write three differences between the two principal vascular tissues found in plants.
Answer:
Xylem | Phloem |
It transport the water. | It transport mainly food. |
Living and dead cells are present. | Living cells are present. |
The movement is unidirectional. | The movement is bidirectional. |
11.) Mention the main characteristic features of meristematic tissues and state whether we find such tissue in plants. Give the function of the meristematic tissue.
Answer: Meristematic tissue considered as one of the important plant tissues which has characteristics such as (a) They are usually present at the tip of the plant. (b) They are responsible for increasing height, size and diameter of the parts of plant. (c) They are characterized as living and thin walled tissues. (d) Meristematic tissue made up of immature cells and they have dense cytoplasm.
Functions of meristematic tissue : Meristematic tissue has continuous division capacity therefore they play major role in growth of plant. They are present at the tip of growing tissues.
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 plant tissues such as xylem and phloem play an important role in movement of water, minerals and food. Specifically xylem transports Water and minerals and have unidirectional flow, whereas phloem is for transport of food. Xylem usually made up of both dead and living cells such as tracheid, vessels, parenchyma and fibers.
13.) Which plant tissue is responsible for the distribution of food prepared in the leaves ? Name the fourcomponent part of the tissue.
Answer: plant tissue is responsible for the distribution of food prepared in the leaves are the conducting tissues called as phloem. The phloem have bidirectional movement and therefore food transported t all parts of the plant. The four component of the phloem are sieve tubes, phloem fibers, companion cells and phloem parenchyma.
14.) Name the various types of animal tissues and state their functions.
Answer: When group of cells come together and form a structure it is called as tissue. There are various types of tissues present in animals such as
(a) Muscular tissue : They play role in movement and locomotion.
(b) Nervous tissue : present in brain and help in control and coordination of entire body.
(c) Connective tissue : They play various role like support, provides strength, transportation and fives protection.
(d) Epithelial tissue : They are usually help in secretion and absorption.
15.) Give the structure and function of different types of epithelial tissues.
Answer: The epithelial tissues are divided into 4 types such as squamous epithelium, cuboidal epithelium, columnar epithelium and ciliated epithelium.
(a) squamous epithelium : They are protective in nature and generally present in outer layer of the skin. They are polygonal in shape.
(b) cuboidal epithelium : They are cube like cells usually present in kidney. It plays role in absorption.
(c) columnar epithelium : These are column like cell and specially present in intestinal region. They are secretory in function.
(d) ciliated epithelium : These have hair like projections, present mainly in respiratory system. They carry out removal of allergen.
16.) Draw the diagram of a neuron and label the following parts in it.
Cyton, axon, nodes of ranvier, internode.
Answer:
17.) Name the three main kinds of muscular tissues. Give the exact location in each kind in an animal body.
Answer: Muscular tissue helps in locomotion and movement. There are 3 types of muscular tissue such (a) Smooth muscle : Smooth muscle are non striated and they are involuntary in action. They are present in blood vessels such as aorta, arteries and veins.
(b) Cardiac muscle: These muscles are striated and involuntary in action. They are present in heart and lungs.
(c) Skeletal muscle: These muscles are voluntary in action, present in bones, and can contract and expand on movement.