Tag: botany

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Questions Related to botany

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

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

  1. Aerenchyma

  2. Collenchyma

  3. Parenchyma

  4. Sclerenchyma
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Sclerenchyma tissue is composed of dead cells with heavily lignified secondary cell walls, providing mechanical strength and support to plant organs. In contrast, parenchyma, collenchyma, and aerenchyma are generally living tissues at maturity.

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

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

  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)
Reveal answer Fill a bubble to check yourself
A Correct answer
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)'.

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

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.

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

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

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

  4. (i) - Phloem, (ii) - descending
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Mineral salts are transported from the roots to the rest of the plant through the xylem tissue. This movement is part of the ascending stream of water driven by transpirational pull.

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

  1. E

  2. B

  3. C

  4. D
Reveal answer Fill a bubble to check yourself
A Correct answer
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'

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

  1. Enucleate condition

  2. Thick secondary walls

  3. Pores on lateral walls

  4. Presence of P-protein
Reveal answer Fill a bubble to check yourself
A Correct answer
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'

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

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

  1. Parenchyma

  2. Collenchyma

  3. Xylem

  4. Phloem
Reveal answer Fill a bubble to check yourself
A Correct answer
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.

Multiple choice botany bacteria bacteria - introduction, shape and structure bacteria: types and structure bacteria; benefits and harmful effects non cellular organism : virus world of virus

Hens egg is

  1. An organ

  2. A single cell

  3. A tissue

  4. None of the above
Reveal answer Fill a bubble to check yourself
B Correct answer
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.