Advertisements
Advertisements
प्रश्न
The body of sponges does not possess tissue level of organisation though it is made of thousands of cells. Comment.
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.
APPEARS IN
संबंधित प्रश्न
The following statement is wrong. Rewrite it correctly by changing either one or two words.
Glandular epithelium is present in kidneys.
Name any one body part where ciliated epithelium is found in humans. What is its function?
Answer the following question.
What is cell junction?
Epithelial cells with cilia are found in ______ of our body.
Lining of small intestine is made up of ______.
A long tree has several branches. The tissue that helps in the side ways conduction of water in the branches is
Describe the structure and function of different types of epithelial tissues. Draw diagram of each type of epithelial tissue.
Assertion: Materials are exchanged between epithelial and connective tissues by diffusion.
Reason: Blood vessels are absent in epithelial tissue.
Mention the type of epithelium seen in the alveoli of lungs.
Write the appropriate type of tissues in column B according to the functions mentioned in column A.
| Column A | Column B |
| a. Secretion and absorption | i. ______ |
| b. Protective covering | ii. ______ |
| c. Linking and supporting framework | iii. ______ |
