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Question
What is simple tissue? Classify and explain its different types with suitable diagram.
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Solution
Simple tissue:
These tissues are composed of structurally and functionally similar cells.
They are of three types.
(i) Parenchyma:
It is widely distributed in plant bodies such as stems, roots, leaves, flowers, and fruits. Its cells are isodiametric and contains live protoplasm. It serves as a food storage and packing tissue. It also stores waste products of plants.
(ii) Collenchyma:
It is located below the epidermis of dicot stem and petiole. It consists of living cells and is characterised by an extra deposition of cellulose at the corners. It is a mechanical tissue in young plants. It also provides elasticity to the plant, particularly stem of dicots.
(iii) Sclerenchyma:
It consist of dead lignified cells. It has two types of cells—that is, fibres and sclereids. It occurs in abundance or in patches in definite layers in stems, roots, veins of leaves, hard covering of seeds, and nuts. It provides mechanical support to the plant.
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RELATED QUESTIONS
Differentiate between parenchyma, collenchyma and sclerenchyma on the basis of their cell wall.
Name the regions in which parenchyma tissue is present.
What is the role of epidermis in plants?
Identify the odd word and explain why it is odd.
Study the diagram given below and then answer the question that follows:
State the function of the parts labelled 1, 2, 3 and 4.
Write 'True or False' for the following statement:
Sclerenchyma cells have intercellular spaces.
The question has four answers. Choose the correct answer:
Hard lignified thick walled, long and pointed cells in a plant are
Match the column (A) with the column (B)
| (A) | (B) | ||
| (a) | Parenchyma | (i) | Thin walled, packing cells |
| (b) | Photosynthesis | (ii) | Carbon fixation |
| (c) | Aerenchyma | (iii) | Localized thickenings |
| (d) | Collenchyma | (iv) | Buoyancy |
| (e) | Permanent tissue | (v) | Sclerenchyma |
Differentiate fibers from sclereids.
Match the followings and choose the correct option from below
| Column I | Column II |
| A. Meristem | i. Photosynthesis, storage |
| B. Parenchyma | ii. Mechanical support |
| C. Collenchyma | iii. Actively dividing cells |
| D. Sclerenchyma | iv. Stomata |
| E. Epidermal tissue | v. Sclereids |
