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प्रश्न
The body of sponges does not possess tissue level of organisation though it is made of thousands of cells. Comment.
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उत्तर
Though all members of Animalia are multicellular, all of them do not exhibit the same pattern of organisation of cells. For example, in sponges, the cells are arranged as loose cell aggregates, i.e. they exhibit the cellular level of organisation. Some division of labour (activities) occurs among the cells. Hence, the body of sponges does not possess a tissue level of organisation.
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संबंधित प्रश्न
What is the following and where do you find them in animal body?
Ciliated epithelium
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| List I | List II |
| A. Mast cells | I. Ciliated epithelium |
| B. Inner surface of bronchiole | II. Areolar connective tissue |
| C. Blood | III. Cuboidal epithelium |
| D. Tubular parts of nephron | IV. specialised connective tissue |
Choose the correct answer from the options give below:
