Tag: permanent tissues and their types

Questions Related to permanent tissues and their types

Conduction of water and minerals is the main function of?

botany tissues defense mechanism in plants epidermal tissue system permanent tissues and their types

  1. Stem

  2. Phloem

  3. Leaf

  4. Xylem

Show answer
Correct Option: A
Select the incorrect pair out of the following.

| (A) Type of tissue - | Function | | --- | --- | | (B) Parenchyma -  | Storage, photosynthesis | | (C) Sclerenchyma-  | Mechanical strength | | (D) Xylem -  | Ascent of sap | | (E) Phloem -  | Conduction of water and minerals |
botany tissues defense mechanism in plants epidermal tissue system permanent tissues and their types

  1. E

  2. B

  3. C

  4. D

Show answer
Correct Option: A
Explanation:
Parenchyma is a simple, permanent tissue - function - storage, photosynthesis, buoyancy etc
Sclerenchyma- dead, lignified tissue - function-mechanical support.
Xylem -complex permanent tissue - function conduction of water and mineral, ascent of sap.
Phloem-complex permanent tissue- conduction of food from source to sink
The incorrect pair is - phloem-conduction of water and minerals
So, the correct answer is 'E'

Multi-directional flow of a variety of organic and inorganic solutes occurs through.

botany tissues defense mechanism in plants epidermal tissue system permanent tissues and their types

  1. Xylem

  2. Vascular tissue

  3. Phloem

  4. Root

Show answer
Correct Option: C
Explanation:

The multi-directional flow of a variety of organic and inorganic solutes occurs through 'phloem'.

A common structural feature of vessel elements and sieve tube elements is
botany tissues defense mechanism in plants epidermal tissue system permanent tissues and their types

  1. Enucleate condition

  2. Thick secondary walls

  3. Pores on lateral walls

  4. Presence of P-protein

Show answer
Correct Option: A
Explanation:

Cells forming the vessels are heavily ligniifed, dead, that is with no protoplasm and nucleus, forming a continuous lacuna by dissolution of the separating walls. 

The cells forming the seive tube are arranged in vertical columns, are not lignified, are living with protoplasm but no nucleus and are connected to each other through partial dissolution of the contact walls forming seive plates.
So, the correct answer is 'Enucleate condition'

Which type of permanent tissue helps in storing food in plants.

botany tissues defense mechanism in plants epidermal tissue system permanent tissues and their types

  1. Parenchyma

  2. Collenchyma

  3. Xylem

  4. Phloem

Show answer
Correct Option: A
Explanation:

Parenchyma is the simple permanent plant tissue and it contains non-specialized cells with thin cell walls. Parenchyma helps in storing food and providing support to the plants. The parenchyma of stem and roots helps to store the water and nutrient.

Collenchyma tissue is made up of elongated cells with irregularly thickened walls. Xylem is the tissue in the vascular plants. Its cells have thick, hard walls. Xylem tissue dies soon after its production. Phloem, are also called bast, tissues in plants that conduct the foods made in the leaves to its all other parts.

So answer A is correct.

In sclerenchyma, wall is

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Lignified

  2. Suberised

  3. Pectinised

  4. Cutinised

Show answer
Correct Option: A
Explanation:

Sclerenchyma cells are characterized by relatively thick, lignified secondary cell walls. The lignified wall gives sclerenchyma cells their rigidity, and they function primarily in mechanical support and water conduction. They also make up most rigid parts of the plant (e.g., seed coats and some fruit walls) and are often positioned so that they provide mechanical protection for softer plant parts. 

So, the correct answer is 'Lignified.'

Common between sclerenchyma and collenchyma is

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Material transport

  2. Conduction of water and minerals

  3. Providing buoyancy

  4. Providing support

Show answer
Correct Option: D
Explanation:
Plants are composed of a variety of different cells, two of which are sclerenchyma and collenchyma. The similarity of both cells is that both of them function for support. These cells are two of the three classes of ground tissue together with Parenchyma cells. Collenchyma cells are responsible for giving support to extra structural regions and Sclerenchyma cells are the main structural support for plants. 
So, the correct answer is 'Providing support.'

Which of the following is not related to the structure of stomata?

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Epidermal cells

  2. Guard cells

  3. Sclerenchyma cells

  4. Accessory cells

Show answer
Correct Option: C
Explanation:

Sclerenchyma is the supporting tissue in plants. Two types of sclerenchyma cells exist: fibers and sclereids. Their cell walls consist of cellulose, hemicellulose and lignin. Sclerenchyma cells are the principal supporting cells in plant tissues that have ceased elongation where as Stomata are cell structures in the epidermis of tree leaves and needles that are involved in the exchange of carbon dioxide and water between plants and the atmosphere.

So, the correct answer is 'Sclerenchyma cells.'

Which is not true regarding sclerides?

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Found in shells of nuts, pulp of Guava and Pea

  2. Stone cells

  3. Constituent of sclerenchyma

  4. Group of living cells

Show answer
Correct Option: D
Explanation:
Sclereids are a reduced form of sclerenchyma cells with highly thickened, lignified cellular walls that form small bundles of durable layers of tissue in most plants. The presence of numerous sclereids form the cores of apples and produce the gritty texture of guavas. 
So, the correct answer is 'Group of living cells.'

Compare the statements a and b
Statement a. Sclerenchyma cells do not have plasmodesmata
Statement b. Cell walls of some permanent tissues are heavily lignified.

botany plant tissues permanent tissues and their types simple permanent tissues tissues: plant tissues

  1. Statement a is correct and b is wrong

  2. Both the statements a and b are wrong

  3. Both the statements a and b are correct

  4. Statement a is wrong and b is correct

Show answer
Correct Option: C
Explanation:

Plasmodesmata are narrow channels that act as intercellular cytoplasmic bridges to facilitate communication and transport of materials between plant cells and are not found in Sclerenchyma cells. Sclerenchyma fibres are long and narrow and have thick lignified cell walls. They provide mechanical strength to the plant and allow for the conduction of water. Sclereids are specialised sclerenchyma cells with thickened, highly lignified walls with pits running through the walls.

So, the correct answer is 'Both the statements a and b are correct.'