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प्रश्न
What is the utility of tissues in multi-cellular organisms?
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उत्तर
In unicellular organisms, a single cell performs all the basic functions, such as respiration, movement, excretion, digestion, etc. But in multicellular organisms, cells are grouped to form tissues. These tissues are specialised to carry out a particular function at a definite place in the body.
- For example, muscle cells form muscular tissues, which help with movement, and nerve cells form nervous tissue, which helps transmit messages.
- This is known as the division of labour in multicellular organisms. Because of this division of labour, multicellular organisms can perform all functions efficiently.
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संबंधित प्रश्न
Write down names of different types of plant tissues.
What are the different tissues in animals.
Write one word for the following:
A group of similar cells performing a specific function.
What is the difference between cells and tissue?
Match the words of column A with the appropriate words of column B:
| Column A | Column B |
| (a) Adipose tissue | (i) Cyton |
| (b) Neuron | (ii) Unstriated muscles |
| (c) The dark and light band | (iii) Columnar epithelium |
| (d) Dermis of skin | (iv) Striated muscles |
| (e) Sieve pits | (v) Fat cells |
| (f) Br ick like | (vi) Phloem |
Choose the correct option.
Cambium is also called ______.
Choose the correct option.
______ is a complex permanent tissue.
Match the following.
| Sclereids | Chlorenchyma |
| Chloroplast | Sclerenchyma |
| Simple tissue | Collenchyma |
| Companion cell | Xylem |
| Trachieds | Phloem |
Phloem tissue is involved in the transport of water in plants.
A plant tissue, when stained, showed the presence of hemicellulose and pectin in cell wall of its cells. The tissue represents ______.
