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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
Fill in the blank
Epithelial tissue is made of cells without any ...................... spaces.
Write the name of the following tissue.
Tissue lining the inner surface of the mouth.
Name one place in living organisms where the following tissues is located:
Squamous epithelium
Name the kind of cells found in the following place:
Inner lining of the wind pipe
Name the tissues found:
in the testes and ovaries.
Answer the following question.
What is cell junction?
Some epithelia are pseudostratified. What does this mean?
Fats are stored in human body as
Nerve cell does not contain
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Epithelial layer is permeable layer.
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The ______ epithelium is also known as the pavement membrane.
Glandular epithelium gives a stratified appearance.
Write one point of difference between
Simple and compound epithelial tissue.
Name the different cell junctions found in tissues.
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Match List I with List II.
| 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:
