Tag: botany

Questions Related to botany

Which one of the following can be considered to be a dead mechanical tissue?

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

  1. Aerenchyma

  2. Collenchyma

  3. Parenchyma

  4. Sclerenchyma

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Correct Option: A

Match the following and choose the correct option from below.

A. Cuticle (i) Guard cells
B. Bulliform cells (ii) Single layer
C. Stomata (iii) Waxy layer
D. Epidermis (iv) Empty colourless cell
botany plant tissues defense mechanism in plants epidermal tissue system permanent tissues and their types

  1. A-(iii), B-(iv), C-(i), D-(ii)

  2. A-(i), B-(ii), C-(iii), D-(iv)

  3. A-(iii), B-(ii), C-(iv), D-(i)

  4. A-(iii), B-(ii), C-(i), D-(iv)

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Correct Option: A
Explanation:

A. Cuticle: It is a fatty substance( cutin) deposited over the surface of epidermal cells in the form of a separate layer. Usually, the cuticle is covered with wax which may be deposited in the form of granules, rods, crusts or viscous semi-liquid masses.

B. Bulliform cells: They are thin-walled and contain big vacuoles filled with water. They play an important role in folding and unfolding of leaves.
C. Stomata: A typical stoma is microscopic and usually consists of two kidney-shaped guard cells surrounding a pore.
D. Epidermis: The epidermis of most of the plant is single-layered (uniseriate) but in some cases, it may be more than one layer thick (multiseriate).
So, the correct answer is 'A-(iii), B- (iv), C-(i), D-(ii)'.

Minerals salts are translocated through (i) along with the (ii) stream of water, which is pulled up through the plant by transpirational pull.
Fill up the blanks in the given statement and select the correct option.

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

  1. (i) - Xylem, (ii) - ascending

  2. (i) - Xylem, (ii) - descending

  3. (i) - Phloem, (ii) - ascending

  4. (i) - Phloem, (ii) - descending

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Correct Option: A

Mineral nutrients absorbed by roots, move to leaves through

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

  1. Xylem

  2. Phloem

  3. Sieve tube

  4. Companion cell

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Correct Option: A

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

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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

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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

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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

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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

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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.

Hens egg is

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  1. An organ

  2. A single cell

  3. A tissue

  4. None of the above

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Correct Option: B
Explanation:

Hens egg is a single cell structure inside the shell before the fertilization that can be seen by naked eyes. But after fertilization, the cells fused and divide into two cells inside the shell.

Hence, option B is correct.