A simple mechanical tissue devoid of lignin is -a)Parenchymab)Collenchymac)Sclerenchymad)ChlorenchymaCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Both sclerenchyma and collenchyma are mechanical tissues, but sclerenchyma contains lignin. Hence the simple mechanical tissue without lignin is collenchyma. where's  parenchyma function in storage and  photosynthesis,

Answer

The is "mechanical tissue". Both sclerenchyma and collenchyma are mechanical tissues, but sclerenchyma contains lignin. Hence the simple mechanical tissue without lignin is chollenchyma.

Answer

Explanation:

Mechanical tissues in plants provide structural support and strength. They are composed of cells with thick, rigid cell walls that help in mechanical support. Lignin is a complex polymer found in the cell walls of plants that provides additional strength and rigidity. Therefore, a mechanical tissue devoid of lignin would be a tissue that lacks this strengthening component.

Types of Mechanical Tissues:

There are three types of mechanical tissues in plants:

1. Parenchyma:
- Parenchyma cells are the most common type of plant cells.
- They have thin, flexible cell walls and a large central vacuole.
- Parenchyma tissue functions in storage, photosynthesis, and secretion.
- However, due to their thin cell walls, they do not provide significant mechanical support.
- Hence, parenchyma is not the correct answer.

2. Collenchyma:
- Collenchyma cells have unevenly thickened cell walls due to the deposition of cellulose and pectin.
- These cells are elongated and usually found in young stems and leaves.
- Collenchyma tissue provides flexible support to growing parts of the plant.
- It allows the plant to bend without breaking.
- The absence of lignin in collenchyma cells makes them less rigid, but they still provide mechanical support.
- Therefore, collenchyma is the correct answer.

3. Sclerenchyma:
- Sclerenchyma cells have thick, rigid cell walls with a high lignin content.
- They are dead at maturity and provide structural support to mature plant parts.
- Sclerenchyma cells are highly specialized and can be further classified into fibers and sclereids.
- The presence of lignin in sclerenchyma cells makes them extremely rigid and strong.
- Therefore, sclerenchyma is not the correct answer.

4. Chlorenchyma:
- Chlorenchyma cells are parenchyma cells that contain chloroplasts.
- They are responsible for photosynthesis and are found in the mesophyll of leaves.
- Chlorenchyma tissue does not provide significant mechanical support.
- Therefore, chlorenchyma is not the correct answer.

Based on the above explanations, the correct answer is option 'B' - Collenchyma, as it is a type of mechanical tissue that lacks lignin and provides flexible support to growing parts of the plant.

Answer

Collenchyma also provide mechanical strength as it is mechanical tissue but it is devoid of lignin

Similar NEET Doubts

Can you explain the answer of this question below:A simple mechanical tissue with non lignified walls isA: Parenchyma B: Collenchyma C: Sclerenchyma D: Chlorenchyma The answer is b.

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A simple mechanical tissue with unlignified walls is

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