- 1(current)
Q. No.In which group of organisms the cell walls form two thin overlapping shells which fit together?
| 1. | Chrysophytes | 2. | Euglenoids |
| 3. | Dinoflagellates | 4. | Slime moulds |
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Which of the following organisms are known as chief producers in the oceans?
| 1. | Dinoflagellates | 2. | Diatoms |
| 3. | Cyanobacteria | 4. | Euglenoids |
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| 1. | The two overlapping shells of cell wall fit together as in a soap box. |
| 2. | They are the chief ‘producers’ in the oceans. |
| 3. | Their cell walls are embedded with silica. |
| 4. | Diatoms behave like heterotrophs when deprived of sunlight. |
Diatomaceous earth is used as heat insulator in boilers and steam pipes because the cell wall of diatom is:
| 1. | composed of iron | 2. | composed of silicon dioxide |
| 3. | conductor of heat | 4. | bad conductor of electricity |
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The structure shown in the given figure represents:
| 1. | the newest version of a Bluetooth speaker by Amazon |
| 2. | the soap case like cell wall of a diatom |
| 3. | cellulosic plates in the walls of dinoflagellates |
| 4. | pellicle in the wall of euglenoids |
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Q. No.
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