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Test: Tissue- 2 - Class 9 MCQ


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20 Questions MCQ Test Science Class 9 - Test: Tissue- 2

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Test: Tissue- 2 - Question 1

Which muscles act involuntarily?
(i) Striated muscles
(ii) Smooth muscles
(iii) Cardiac muscles
(iv) Skeletal muscle

Detailed Solution for Test: Tissue- 2 - Question 1

The working of both smooth and cardiac muscles is involuntary while Skeletal or striated muscles move  according to our will  and are voluntary in action.

Test: Tissue- 2 - Question 2

The plant tissue which provides mechanical strength and consists of living cells, is

Detailed Solution for Test: Tissue- 2 - Question 2
Plant Tissue Providing Mechanical Strength:



The plant tissue that provides mechanical strength and consists of living cells is called collenchyma.



Characteristics of Collenchyma Tissue:

- Collenchyma tissue is composed of elongated living cells.

- The cells have thickened primary cell walls, especially at the corners.

- The thickening is due to the deposition of cellulose, hemicellulose, and pectin.

- Collenchyma cells can stretch and provide flexible support to growing parts of the plant.

- They are usually found in young stems, petioles, and leaf veins.



Function of Collenchyma Tissue:

- Collenchyma tissue provides mechanical support and flexibility to the plant.

- It helps in maintaining the shape and structure of the plant organs.

- It allows for the growth and expansion of the plant without losing the rigidity.



Comparison with Other Plant Tissues:

- Parenchyma: Parenchyma tissue consists of thin-walled living cells and is involved in various functions such as storage, photosynthesis, and secretion. It does not provide mechanical strength like collenchyma.

- Aerenchyma: Aerenchyma tissue consists of loosely arranged air-filled spaces and is found in aquatic plants. It helps in buoyancy and gas exchange but does not provide mechanical strength.

- Sclerenchyma: Sclerenchyma tissue consists of thick-walled, dead cells with lignified secondary cell walls. It provides rigid support and protection to the plant but is not composed of living cells like collenchyma.



Therefore, the correct answer is C: Collenchyma.
Test: Tissue- 2 - Question 3

Cartilage is not found in 

Detailed Solution for Test: Tissue- 2 - Question 3

Cartilage is not found in kidney. As cartilage is a structural component  of our body act as connective tissue which  is not required in the kidney. They are flexible connective tissue mainly found in ribs, ear, nose  etc.

Test: Tissue- 2 - Question 4

The conducting cells of xylem are

Detailed Solution for Test: Tissue- 2 - Question 4
The conducting cells of xylem are:


The conducting cells of xylem are responsible for the transport of water and mineral nutrients from the roots to the rest of the plant. These cells are specialized for efficient water conduction and are divided into two main types: tracheids and vessels.
1. Tracheids:
- Tracheids are elongated, narrow cells with tapered ends.
- They have thick, lignified cell walls that provide strength and support.
- Water moves through tracheids via pits, which are thin areas in the cell wall where water can pass from one tracheid to another.
- Tracheids are found in all vascular plants, including ferns, conifers, and flowering plants.
2. Vessels:
- Vessels are wider and shorter cells compared to tracheids.
- They are composed of multiple cells called vessel members that are aligned end-to-end.
- Vessel members are joined together by perforation plates, which allow for efficient water flow.
- Vessels are found in angiosperms, which are flowering plants.
- They are more efficient in water conduction compared to tracheids due to their larger diameter.
Conclusion:
The conducting cells of xylem are tracheids and vessels. Tracheids are found in all vascular plants, while vessels are specific to angiosperms. These cells work together to transport water and minerals from the roots to the rest of the plant, ensuring its survival and growth.
Test: Tissue- 2 - Question 5

Survival of plants in terrestrial environment has been made possible by the presence of

Detailed Solution for Test: Tissue- 2 - Question 5

The conducting tissues in plants conduct different saps and have different structures. The primary conducting tissues or plants are Xylem and Phloem. Xylem conducts water from roots to other parts of the plant, whereas phloem transport food and other material from the leaves to other parts of plants.

Test: Tissue- 2 - Question 6

___________ smoothens the bone surfaces at the joints.

Detailed Solution for Test: Tissue- 2 - Question 6

Cartilage is the tissue that smoothes bone surfaces at joints. It is a type of connective tissue. It is an elastic tissue.It  protects the joints . It  is present at the joints. Nose and
Ear  also has cartilage tissues.
 

Test: Tissue- 2 - Question 7

Intestine absorbs the digested food materials. What type of epithelial cells are responsible for that?

Detailed Solution for Test: Tissue- 2 - Question 7
Type of Epithelial Cells Responsible for Absorption in the Intestine
The type of epithelial cells responsible for absorption in the intestine are columnar epithelium. Here is a detailed explanation:
1. Structure of Columnar Epithelium:
- Columnar epithelium is a single layer of tall, rectangular-shaped cells.
- These cells have elongated nuclei located near the base of the cells.
- They are tightly packed together, forming a barrier between the lumen (inside) of the intestine and the underlying tissue.
2. Function of Columnar Epithelium:
- Columnar epithelium is specialized for absorption and secretion.
- The tall shape of the cells increases the surface area available for absorption.
- Microvilli, tiny finger-like projections on the surface of the cells, further increase the surface area for absorption.
3. Absorption in the Intestine:
- The intestine is responsible for the absorption of nutrients from the digested food.
- The columnar epithelial cells lining the intestine play a crucial role in this process.
- Nutrients such as sugars, proteins, and fats are absorbed by these cells through active transport and diffusion.
- Once absorbed, the nutrients enter the bloodstream and are transported to various parts of the body to provide energy and support cellular functions.
4. Adaptations of Columnar Epithelium for Absorption:
- The presence of microvilli greatly increases the surface area for absorption.
- The columnar shape of the cells allows for efficient absorption and secretion.
- The cells are held together by tight junctions, preventing leakage of absorbed nutrients.
In conclusion, columnar epithelial cells are responsible for the absorption of nutrients in the intestine. Their specialized structure and adaptations enable efficient absorption of nutrients from the digested food.
Test: Tissue- 2 - Question 8

Branched involuntary muscle fibres are found in

Detailed Solution for Test: Tissue- 2 - Question 8

Skeletal muscle fibers are cylindrical, multinucleated, striated, and under voluntary control. Smooth muscle cells are spindle shaped, have a single, centrally located nucleus, and lack striations. They are called involuntary muscles. Cardiac muscle has branching fibers, one nucleus per cell, striations, and intercalated disks. Its contraction is not under voluntary control.

Test: Tissue- 2 - Question 9

Find out incorrect sentence.

Detailed Solution for Test: Tissue- 2 - Question 9
Incorrect Sentence:
The incorrect sentence is C: "Apical and intercalary meristems are permanent tissues."
Explanation:
Here is a detailed explanation of why sentence C is incorrect:
- Apical and intercalary meristems are not permanent tissues. They are actually examples of meristematic tissues, which are responsible for plant growth and development.
- Meristematic tissues are made up of actively dividing cells and are found in the growing regions of plants, such as the tips of roots and shoots.
- These tissues are responsible for the production of new cells, which then differentiate into various specialized cell types.
- Unlike permanent tissues, meristematic tissues do not have a specific structure or function. They are constantly dividing and giving rise to new cells.
- Permanent tissues, on the other hand, are derived from meristematic tissues and have specific functions in the plant.
- Examples of permanent tissues include parenchyma, collenchyma, and sclerenchyma, which have specialized structures and functions.
Therefore, the correct sentence should be:
"C: Apical and intercalary meristems are meristematic tissues."
Test: Tissue- 2 - Question 10

Chlorenchyma and aerenchyma are modified/ specialised

Detailed Solution for Test: Tissue- 2 - Question 10
Chlorenchyma and Aerenchyma
Chlorenchyma and aerenchyma are both modified or specialized types of plant tissue.
Chlorenchyma:
- Chlorenchyma is a type of parenchyma tissue that contains chloroplasts, which are responsible for photosynthesis.
- It is found primarily in the leaves of plants.
- Chlorenchyma cells are loosely packed with large intercellular spaces to allow for efficient gas exchange.
- The cells have thin cell walls and a large central vacuole.
- Chlorenchyma tissue provides support and participates in photosynthesis, producing energy-rich carbohydrates for the plant.
Aerenchyma:
- Aerenchyma is also a type of parenchyma tissue but with large air spaces.
- It is found in aquatic plants or plants growing in waterlogged soils.
- Aerenchyma tissue provides buoyancy to the plant and allows for the exchange of gases between the plant's roots and the surrounding water or soil.
- The large air spaces in aerenchyma tissue help in oxygen diffusion to the submerged plant parts, preventing suffocation.
- Aerenchyma tissue also aids in the transportation of nutrients and water within the plant.
Conclusion:
- Chlorenchyma and aerenchyma are both modified forms of parenchyma tissue with specific adaptations to fulfill different functions in plants.
- Chlorenchyma is involved in photosynthesis, while aerenchyma is important for aeration and buoyancy in aquatic plants.
Test: Tissue- 2 - Question 11

The dead element present in the phloem is

Detailed Solution for Test: Tissue- 2 - Question 11
The dead element present in the phloem is phloem fibres.
Phloem is a complex tissue in plants that is responsible for the transport of sugars, nutrients, and other organic molecules from the leaves to other parts of the plant. It is composed of several different cell types, including sieve tubes, companion cells, phloem parenchyma, and phloem fibres.
Here's a detailed explanation of each of these cell types and why phloem fibres are the dead element in the phloem:
1. Sieve tubes:
- Sieve tubes are the main conducting cells in the phloem.
- They are elongated cells that are connected end-to-end to form a continuous tube.
- Sieve tubes have sieve plates at their ends, which are perforated to allow the flow of sap.
- These cells are living but lack a nucleus, ribosomes, and other organelles.
2. Companion cells:
- Companion cells are closely associated with sieve tubes and provide metabolic support to them.
- They have a nucleus and other organelles, allowing them to carry out cellular functions.
- Companion cells are connected to sieve tubes through plasmodesmata, small channels that allow the exchange of materials.
3. Phloem parenchyma:
- Phloem parenchyma cells are living cells that are involved in storage and metabolism.
- They are relatively unspecialized and can perform various functions depending on their location in the plant.
4. Phloem fibres:
- Phloem fibres are long, slender cells that provide mechanical support to the phloem.
- Unlike sieve tubes, companion cells, and phloem parenchyma cells, phloem fibres are dead at maturity.
- They have thick secondary cell walls composed of cellulose, lignin, and other structural materials.
- Phloem fibres are responsible for maintaining the structural integrity of the phloem tissue.
In conclusion, among the different cell types present in the phloem, phloem fibres are the dead element. They provide mechanical support to the phloem tissue, but they lack cellular components and are non-functional in terms of metabolic activities.
Test: Tissue- 2 - Question 12

The substance found in the cell wall of cork or bark that makes it impervious to water is

Detailed Solution for Test: Tissue- 2 - Question 12
The substance found in the cell wall of cork or bark that makes it impervious to water is:

  1. Lignin: Lignin is a complex polymer found in the cell walls of plants and is responsible for providing rigidity and strength. While lignin does contribute to the impermeability of cork and bark, it is not the primary substance that makes them impervious to water.

  2. Cutin: Cutin is a waxy substance found in the cuticle of plant leaves and stems. It helps to reduce water loss by forming a waterproof barrier. However, cutin is not present in the cell walls of cork or bark.

  3. Suberin: Suberin is a lipid-like substance found in the cell walls of cork and bark. It is highly hydrophobic and forms a waterproof barrier, making cork and bark cells impermeable to water. Suberin is the correct answer in this case.

  4. Pectin: Pectin is a polysaccharide found in the primary cell walls of plants. It is involved in cell adhesion and helps to maintain cell structure. However, pectin does not contribute to the impermeability of cork or bark.


In summary, the substance found in the cell wall of cork or bark that makes it impervious to water is suberin. Suberin forms a waterproof barrier and prevents water from entering or leaving the cells, allowing cork and bark to have their characteristic water resistance.
Test: Tissue- 2 - Question 13

Meristematic tissues in plants are

Detailed Solution for Test: Tissue- 2 - Question 13
Meristematic tissues in plants are:
- Localised and dividing cells: Meristematic tissues are found in specific regions of the plant, such as the tips of roots and shoots. These tissues consist of actively dividing cells, which contribute to the growth and development of the plant.
- Not limited to certain regions: While meristematic tissues are primarily found in the apical meristems (tips) of roots and shoots, they can also be present in other parts of the plant, such as the lateral meristems (cambium) and intercalary meristems (in between mature tissues).
- Growing in volume: As meristematic cells divide, they contribute to the growth of the plant in terms of both length and width. This allows the plant to increase in size and develop new organs and tissues.
- Permanent: Meristematic tissues are continuously active throughout the lifespan of the plant. They are responsible for the production of new cells, which eventually differentiate into various specialized tissues, such as vascular tissue, epidermis, and ground tissue.
In conclusion, meristematic tissues in plants are localized and composed of dividing cells. They are not limited to certain regions and are responsible for the growth and development of the plant.
Test: Tissue- 2 - Question 14

The mineral elements found in our bone making it hard, are

Detailed Solution for Test: Tissue- 2 - Question 14
The mineral elements found in our bone making it hard are:
- Calcium: Calcium is the most abundant mineral in the body and plays a crucial role in the formation and maintenance of strong bones. It provides the basic structure and strength to our bones.
- Phosphorus: Phosphorus works together with calcium to form a mineral complex called hydroxyapatite, which is the main component of bone. It helps in the mineralization of bones, making them hard and strong.
- Sodium: Sodium is an essential mineral that helps in maintaining the balance of fluids in our body. While it is present in small amounts in our bones, it does not contribute significantly to the hardness of bones.
- Potassium: Potassium is another mineral that is present in small amounts in bones. It helps in regulating the acid-base balance in the body but does not directly contribute to bone hardness.
Therefore, the correct answer is B: Calcium and phosphorus. These two minerals work together to provide the necessary strength and hardness to our bones.
Test: Tissue- 2 - Question 15

Flexibility in plants is due to

Detailed Solution for Test: Tissue- 2 - Question 15
Flexibility in plants is due to the presence of collenchyma tissue. Collenchyma cells are elongated and have thickened cell walls, providing strength and support to the plant. Here is a detailed explanation of why flexibility in plants is due to collenchyma:
Collenchyma tissue:
- Collenchyma is a type of ground tissue found in plants.
- It is made up of living cells with thickened cell walls.
- Collenchyma cells are elongated and have irregularly thickened corners.
- They are often found beneath the epidermis, providing support to young and actively growing parts of the plant.
Function of collenchyma tissue:
- Collenchyma tissue provides flexibility to the plant.
- It allows plants to bend and sway without breaking.
- The thickened cell walls of collenchyma cells provide strength and support to the plant.
- Collenchyma tissue is particularly important in herbaceous plants, where it helps to support the growing shoots and leaves.
- It also plays a role in tissue repair and wound healing.
In conclusion, flexibility in plants is due to the presence of collenchyma tissue. The elongated cells with thickened cell walls provide strength, support, and flexibility to the plant, allowing it to bend and sway without breaking.
Test: Tissue- 2 - Question 16

Glands in our body are formed by

Detailed Solution for Test: Tissue- 2 - Question 16

Epithelial tissue gives rise to glands in the body. They line the surface of various ducts, glands and organs. This type of tissue is also known as glandular Epithethillum increase by mitosis.

Test: Tissue- 2 - Question 17

 Which is not a function of epidermis ?

Detailed Solution for Test: Tissue- 2 - Question 17

Epidermis is present as outermost layer of plant body such as leaves, flowers, stem and root. It is covered with cuticle (a waterproof layer of waxy substance cutin) The main function of epidermis is to protect the plant from desiccation and infection. In fact, cuticle of epidermis helps to reduce water loss by evaporation from the plant surface and also helps in preventing the entry of pathogen (bacteria, fungi etc.). The aerial surface of many plant bear cutinised hair (trichomes) to reduce transpiration.

Test: Tissue- 2 - Question 18

Tendons help to connect

Detailed Solution for Test: Tissue- 2 - Question 18
Tendons help to connect:
1. Bone to bone: Tendons are responsible for connecting bones to bones in the body. They provide stability and support to the skeletal system.
2. Muscle to bone: The main function of tendons is to connect muscles to bones. They transmit the force generated by the muscles to the bones, allowing movement and enabling us to perform various activities.
3. Muscle to muscle: Although tendons primarily connect muscles to bones, there are instances where tendons can also connect muscles to other muscles. These connections are known as myotendinous junctions and play a role in coordinating muscle movements.
4. All of the above: The correct answer is option B, as tendons connect muscles to bones. However, it is important to note that tendons can also connect bones to bones and muscles to muscles in certain situations.
Tendons are essential for the proper functioning of the musculoskeletal system. They provide stability, transmit forces, and allow for coordinated movements. Without tendons, our muscles would not be able to effectively move our bones, resulting in limited mobility and functionality.
Test: Tissue- 2 - Question 19

Muscles whose contraction is under our control are

Detailed Solution for Test: Tissue- 2 - Question 19
Muscles whose contraction is under our control are:

  • Skeletal muscles: These are the muscles attached to our bones and are responsible for voluntary movements. They are under our conscious control and allow us to move and perform various activities.


Other options mentioned in the question are not correct:



  • Nerve muscles: There is no such term as "nerve muscles." Nerves are responsible for transmitting signals from the brain to the muscles, but they are not muscles themselves.

  • Epidermal muscles: The epidermis is the outermost layer of the skin and does not contain muscles.

  • Xylem muscles: Xylem is a type of tissue found in plants that transports water and nutrients. It does not have the ability to contract like muscles.


Therefore, the correct answer is option A: skeletal muscles.

Test: Tissue- 2 - Question 20

The mechanical strength and rigidity of cell wall is due to

Detailed Solution for Test: Tissue- 2 - Question 20

Lignin is the complex polymeric molecule composed of Phenylpropanoid units associated with cellulose ( as Lignocellulose) in cell walls of Sclerenchyma, Xylem vessels are tracheids, making them strong and rigid. After cellulose, lignin is the most abundant plant polymer, forming 20-30% of the wood of the trees.

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