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Question : 13
Total: 60
The correct statements with reference to single called organisms are
(i) Complex substances are not broken down into simple substances.
(ii) Simple diffusion is sufficient to meet the requirement of exchange of gases.
(iii) Specialised tissues perform different functions in the organism.
(iv) Entire surface of the organism is in contact with the environment for taking in food.
(i) Complex substances are not broken down into simple substances.
(ii) Simple diffusion is sufficient to meet the requirement of exchange of gases.
(iii) Specialised tissues perform different functions in the organism.
(iv) Entire surface of the organism is in contact with the environment for taking in food.
Solution:
The following are the correct statements with respect to single-celled organisms:
1. Complex food is broken down into simpler substances in single-celled organism by the process of digestion which takes place inside the food vacuoles.
2. Simple diffusion is sufficient to meet the requirement of the exchange of gases in single-celled organisms.
3. Specialised tissues are not formed in single-celled organisms because the tissue is formed by a group of cells.
4. The entire surface of the single celled organisms is in direct contact with the environment for taking food.
1. Complex food is broken down into simpler substances in single-celled organism by the process of digestion which takes place inside the food vacuoles.
2. Simple diffusion is sufficient to meet the requirement of the exchange of gases in single-celled organisms.
3. Specialised tissues are not formed in single-celled organisms because the tissue is formed by a group of cells.
4. The entire surface of the single celled organisms is in direct contact with the environment for taking food.
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