Tissues Class 9 Biology Worksheet Pdf
Class 9 Biology students should refer to the following printable worksheet in Pdf for Tissues in standard 9. This test paper with questions and answers for Grade 9 Biology will be very useful for exams and help you to score good marks
Class 9 Biology Worksheet for Tissues
Very Short Answer Type Questions
Question. What are areolar tissues’ junctions?
Answer : Areolar tissues are connective tissue found in animals. We can find them between skin and muscles, around blood vessels and nerves, in bone marrow. These tissues fill the space inside the organs. They support internal organs and help to repair tissues.
Question. What are permanent tissues?
Answer : The cells of meristematic tissue lose the ability to divide and get differentiated into specialised cells. These differentiated cells form different types of tissues which are known as permanent tissues. Some examples of permanent tissues are : parenchyma, sclerenchyma, etc.
Question. Where is apical meristem found?
Answer : Growing tips of stems and roots of plants are the main are where apical meristem is present . It helps in increasing the length of the stem and the root.
Question. What is the utility of tissues in multicellular organisms?
Answer : In multicellular organisms, the body system is based on the division of labour( like muscle cells form muscular tissue to which helps in movement ). It means the cells performing a specific function are grouped together to form a particular tissue. The different tissues are organized in a way to provide highest efficiency in functioning of the body.
Short / Long Answer Type Questions
Question. What are the constituents of phloem?
Answer : The constituents of phloem tissue are:
1. Sieve tubes (tubular living cells with perforated end walls)
2. Companion cell (living cells)
3. Phloem parenchyma (living cells)
4. Phloem fibres (non-living and sclerenchyma cells)
Question. What does a neuron look like?
Answer : A neuron consists of a cell body with a nucleus and cytoplasm.
It has two important extension name as axon and dendrites. Each neuron has a single long part, called the axon and many short, branched parts called dendrites. Many nerve fibres bound together by connective tissue to make up a nerve.
Question. What are the functions of areolar tissue?
Answer : Functions of areolar tissue:
1. It fills the space inside the organs, thus acts as a packing tissue between the organs.
2. It supports many delicate organs in the body.
3. It plays role in repair of tissues.
Question. How many types of elements together make up the xylem tissue? Name them.
Answer : The following four types of elements make up xylem tissue:
1. Xylem tracheids.
2. Xylem vessels.
3. Xylem parenchyma.
4. Xylem fibres.
Question. Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall.
Answer : Differences between parenchyma, collenchyma and sclerenchyma
These are living cells with thin walls.
Cells are uniformly thin.
The cells are loosely packed with large intercellular spaces.
These are living cells with slightly thick walls.
Cells are elongated.
The cells are irregularly thickened at the corners with very little intercellular spaces.
These are dead cells with thick cell walls.
Cells are long and narrow.
The cells are thickened due to lignin. These are so thick that there is no internal space inside the cell.
Question. Diagrammatically show the difference between the three types of muscle fibres.
Answer : The three type of muscles fiber are:
1. Streated muscle
2. Smooth muscle
3. Cardiac muscle
Question. Explain the structure of three types of muscle fibres. Also write the locations where they are found in the body.
Answer : The followings are the three types of muscle cells :
1. Unstriated muscles (also known as smooth, involuntary muscles) : This type of muscular tissue consists of spindle-shaped, long uninucleated cells. This type of muscles are present in alimentary canal, blood vessels, iris of eye, in ureters and bronchi of lungs, etc.
2. Striated muscles (also known as voluntary muscles because oftheir function being in our control or will) : This type ofmuscular cells are long multinucleated and enclosed in a membrane called sarcolemma. Each fibre has several longitudinal filaments embedded in cytoplasm. These filaments give these muscles striated appearance. These muscles are attached to the skeleton; so they are called skeletal muscles.
3. Cardiac muscles : These muscles are found in heart. They are not under the control of the will. They contract rhythmically and involuntarily throughout life without the sign of fatigue. Structurally they show the characters of both unstriated and striated muscles. They are made up of branched fibres. These fibres are uninucleated and show alternate light and dark bands (striation).
Question. How many types of meristems are present in plants, on the basis of position?
Answer : On the basis of location of meristem, it is classified into three types :
1. Apical meristem is present at the tip of stem, roots and their branches.
2. Intercalary meristem is found at the leaf base, above the nodes (i.e. at the base of internodes as in grasses) or below the nodes (i.e. at the uppermost region of internode as in mint).
3. Lateral meristem
4. Vascular cambium and cork cambium are the examples of lateral meristem.
5. Vascular cambium is found in vascular bundles while cork cambium is found underneath the bark of trees. Both of these cause increase in girth of plants.
Question. Name the two types of tissues.
Answer : (i) Animal tissues
(ii) Plant tissues
Question. Name two types of plant tissues.
Answer : (i) Permanent tissue
(ii) Meristematic tissue
Question. Explain plant tissue in detail.
Answer : Plant tissue is mainly divided into two categories :
• Meristematic tissue
• Permanent tissue
Meristematic tissue : The cells divide very fast. It helps in the growth of the plants. The shape of the cell is oval, round and polygonal. There is no intercellular space. There are three types of meristematic tissues :
(i) Apical meristem : Growth in length
(ii) Lateral meristem : Growth in breadth or thickness
(iii) Intercalary meristem : Growth in inter-nodes Permanent tissue : When meristematic tissue stops dividing and gets mature, then it forms permanent tissue. There are two types of permanent tissues : (i) Simple tissue (ii) Complex tissue (i) Simple
Tissue : Simple tissues are same in structure and perform the same functions. There are three types of simple
tissues : (a) Parenchyma : It is present in soft parts.
(b) Collenchyma : It provides mechanical strength to plants and is found in stalks.
(c) Sclerenchyma : It provides support as well as flexibility to plants.
(ii) Complex Tissue : They are different in structure but perform the same function in group. There are two
types of complex tissues :
(a) Xylem : It transports water from roots to shoot in plants.
(b) Phloem : Transports foods to all parts of the plant.
Question. Explain epidermis in plants.
Answer : It forms the outermost layer of the plant. It is comprised of a single cell layer. This tissue forms a protective layer for plants and that helps to protect the internal parts of plants. It helps in protection against loss of water, attack by parasitic fungi and mechanical injury. Epidermis has small pores known as stomata. They are small holes or pores on the surface of leaves which help in exchange of gases and also in transpiration. Epidermis has long parts like hair that provide greater surface area for water absorption in roots. In plants found in deserts, epidermis consists of a thick waxy coating called cutin which makes the outer layer water resistant.
Q1 Which cells can contract and relax?
Q2 Name the substance that makes cork compact.
Q3 What are root hair?
Q4 What is transpiration?
Q5 What is aerenchyma?
Q6 Name the parenchyma tissue which has chlorophyll.
Q7 Where is meristemetic tissue found in plants?
Q8 What is the difference between bone and cartilage?
Q9 Where are tendons and ligaments found?
Q10 Describe the functions of xylem. Write the function of each component.
Q11 What are complex tissues? Write their different kinds.
Q12 What are cork cells?
Q13 What are stomata? Write about their structure and function?
Q14 What are protective tissues?
Q15 Write the characteristics and functions of collenchyma.
Q16 On the basis of structural and functional difference, write the characteristics of plant and animal tissues.
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