CBSE Class 9 Biology Tissues Worksheet Set 05

1 Mark Questions

Question. Where is the aereolar tissue located?
Answer. Found Between skin and underlying muscles also Around blood vessels, nerves and in bone marrow.

Question. Where are sclerenchyma tissues found in plants?
Answer. – Around vascular bundles
– Veins of leaves.
-Hard coverings of seeds and nuts.

Question. Name a connective tissue which smoothens the bone joints.
Answer. Cartilage

Question. What are the two broad classifications in which plant tissue is divided?
Answer. The plant tissues are divided into:
(a) Meristematic tissues
(b) Permanent tissues

Question. What are the places where epithelium tissue is found?
Answer. Found in the inner lining of the mouth, lining of blood vessels covering of other body organs and body cavities.

Question. Name the plant tissues which are made up of dead cells of one type showing thickenings and provide mechanical support to the plants.
Answer. Sclerenchyma

Question. Collenchyma tissue is situated at which part of plant?
Answer. It is present below the epidermis in leaves and stem.

Question. Why does animals of colder region and fishes have thicker layers of subcutaneous fat?
Answer. The subcutaneous fat layer acts as a insulator for animals living in colder region and fishes.

Question. What are the basic functions of sclerenchyma tissue?
Answer. – Mechanical function : makes parts of a plant hard and stiff.
– Protective function : provides strength and enables it to withstand strains.

Question. What are growth tissues?
Answer. The tissues which are responsible for growth in the plants are called growth tissues or Meristematic tissues.

Question. What is meristematic tissue?
Answer. The tissue which is responsible for an increase in the length and girth of the plant and used to divide actively throughout their life time is known as Meristematic tissues.

Question. Where does the soft connective tissue, cartilage is found?
Answer. Found in ear, nose, trachea, larynx and between joints

Question. What is differentiation?
Answer. The process through which cells formed from meristematic tissues acquire a permanent shape, size and function is known as differentiation.

Question. Name a plant tissue which is used to make ropes and jute fibres.
Answer. Sclerenchyma, mainly sclerenchyma fibres.

Question. Name the liquid matrix of blood.
Answer. Plasma

2 Mark Questions

Question. What are Permanent Tissues?
Answer. A group of plant cells which have lost their ability to divide but have taken a particular shape, size and function. They are of two types
a) Simple permanent tissue
b) Complex permanent tissue

Question. Write a short note on neuron.
Answer. Nerve cells or Neuron is the highly specialised unit of cells. They have the ability to receive stimulus from within the body or outside the body And to send impulses to different body parts.

Question. answer in one word.
(a) a tissue found in abundance in animal
(b) a tissue present in brain and spinal cord
(c) a muscle type having spindle shaped cells
(d) a blood cell which is part of immune system
(e) a muscle type which show rhythmic contraction and relaxation throughout the life.
Answer. (a) connective tissue
(b) nervous tissue
(c) smooth muscles
(d) WBC
(e) cardiac muscles

Question. Identify the tissue
(a) Iris of pupil
(b) Muscles of heart
(c) Duct of salivary glands
Answer. (a) smooth muscle tissue
(b) cardiac muscle tissue
(c) stratified cuboidal epithelium

Question. Define division of labour.
Answer. Division of labour is a type of adaptation for cells where different cells are specialised to perform different type of work. Thus decreasing the work load on a single cell and work done becomes more efficient.

Question. Why striated muscles are called skeletal and striped muscles?
Answer. These type of muscles are attached to the bones and helps in the movement of body thus known as skeletal muscles. On the other hand, as the muscle fibres show alternative dark and light stripes thus known as striped muscles.

Question. What is the junction between the terminal part of a axon and the dendrite of the next neuron called?
Answer. Synapse is the place between the two neurons where at one side axon are present and on the other side dendrite. This helps in the transmission of impulses from one neuron to other.

Question. How does cork act as a protective tissue?
Answer. Cork forms several layers on the tree which are known as bark of tree. The properties of cell like absence of intercellular spaces and presence of suberin, a chemical present present in their wall makes the cell impervious to gases and water and thus protects the undrlying tissues from desiccation.

Question. What is the function of xylem and phloem?
Answer. Xylem: It carries water and minerals upward through roots to parts of plant body.
Phloem: It carries prepared food through photosynthesis from leaves to different body parts.

Question. What happens to the cells formed by the Meristematic tissue?
Answer. Cells formed from meristematic tissue takes up a specific role and losses the ability to divide. These cells with some specified functions are then called permanent tissue. This differentiation of permanent tissue forms meristematic tissue.

3 Mark Questions

Question. What the different parts of neuron?
Answer. a) Cell body, contains central nucleus, cytoplasm
(b) dendrons, short processes arising from cyton or cell body, takes impulse towards the cell body.
(c) axon, a single long cylindrical process, takes impulse away from the cell body.

Question. Write the steps involved in an experiment involved in studying of epidermis.
Answer. – Take a fresh leaf, stretch and break it from the middle with pressure.
– Peel of the outermost covering of the leaf
– gently take it off and stain wit safranin
– now put it on the slide and observe under microscope
– you would be able to see the epidermal cells with stomata guarded by guard cells imbedded in them.

Question. What are the functions of blood cells?
Answer. (A) RBC contains haemoglobin which has high oxygen carrying capacity so transports oxygen in the body.
(B) WBC provides immunity to the body by fighting against the foreign invading organisms.
(C) Platelets at site of injury forms clotting of blood to prevent blood loss from the body.

Question. Write any three features of the framework forming connective tissue of the body.
Answer. one the hard connective tissue which forms frame work of the body
– hard and inflexible
– facilitates movement of the body
– cells are embedded in matrix of calcium and phosphate compounds.

Question. Write the functions of the following :
(a) root nodule
(b) cork
(c) neuron
Answer. (a) root nodules contains nitrogen fixing bacteria which fixes nitrogen from atmosphere into the soil.
(b) cork protects plant from foreign invasion of pathogen and excessive heat and loss.
(c) neuron transmit message in the form of impulse to brain and spinal chord which controls and coordinates all the body activities.

Question. Give reason.
(a) Blood, a connective tissue is red in colour.
(b) Movement of food in alimentary canal is not in control of an organism.
(c) Growth of plants takes place in some specific areas.
Answer. (a) RBC, red blood cells a component of blood are the cells containing haemoglobin in them which gives red colour to blood.
(b) As the movement of food is involuntary in nature so is not under a person will.
(c) This is so as only meristematic tissue present at tips ans lateral sides of roots and stems nodes and internodes which are responsible for growth of plants.

Question. Plants requires less energy than animals. Give reason.
Answer. Most of the component in plant tissues is dead and do not have to move in search of food so needs less energy than animals which have most of the cells living which need energy for their maintenance. Also animals are depended on other plants and animals for food so have to travel to fulfil its needs.

Question. Meristematic tissue cells have a prominent nucleus and dense cytoplasm but they lack vacuole. Give reason
Answer. Meristematic tissue works for division of cells thus have a prominent nucleus with dense cytoplasm which enables fast and easy division of cells to generate new cells. But do not have to store food so vacuole is absent in it as vacuoles main function is to store food and waste products.

Question. Name the different type of blood cells present in the body of an animal.
Answer. There are three different types of blood cells present:
(A) Red blood cells
(B) White blood cells
(C) Platelets

Question. What is the fat-storing tissue ? State its function.
Answer. Adipose tissue is a collection of fat cells present below the skin.
Function:
A) acts as a fat reservoir to be used in harsh conditions.
B) forms shock-absorbing cushions around visceral organs of the body like kidney.
C) provides shape to the body.
D) acts as an insulator by preventing heat loss from the body.Being, a poor conductor of heat it regulates body temperature in animals.

Question. Name the following:
a) Tissue that transports prepared food from leaf to the other plant body.
b) Tissue present in the brain
c) Tissue forming the inner lining of respiratory tract
d) Tissue which stores fat in our body
Answer. (a) phloem
(b) nervous tissue
(c) squamous epithelium
(d) adipose tissue

Question. At school, Ravi and his friends where asked to observe the epidermis from leaf under the microscope. For proper study of the slide the tissue was stained. Ravi is confused for the function performed by stain which cleared from his teacher.
From the above paragraph extract the answers for questions asked below:
(a) What is a stain used for in mounting a slide of tissues.
(b) Name the stain used here.
(c) What values of Ravi are shown here?
Answer. (a) For clear visibility of cell organelles studied under microscope, the cells are stained. The colour of stain is taken up by the different cell organelles.
(b) Safranin
(c) The paragraph shows the of attitude of Ravi towards finding new facts.

5 Mark Questions

Question. Parenchyma is very important for plants. Justify
Answer. Various functions performed by parenchyma:
– Acts as a packing tissue
– Provides support to the plant body
– Acts as a storage tissue by storing and assimilating food.
– Allows gaseous exchange through intercellular spaces
– Chlorenchyma: specialised form of parenchyma performs photosynthesis due to presence of chloroplast.
– Aerenchyma: specialised form of parenchyma provides buoyancy to aquatic plants .
– Acts as a water storage tissue in xerophytes.

Question. What are the different types of meristem present? Quote the types of meristematic tissue with their functions.
Answer. On the basis of position, meristem is of three types:
(a) Apical meristem –
Position: Found at the growing tips of roots and steam.
Function: Helps in increase of the height of the plant.
(b) Lateral meristem-
Position: Found beneath the bark
Function: helps in the increase in the diameter or girth of the stem and root
(c) Intercalary meristem –
Position: Found at the base of the leaves or internodes
Function: Helps in the increase in the length of the leaves and internodes.