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Q. No.The cell wall of diatoms is characterised by which of the following features?
1. Composed entirely of peptidoglycan with siliceous depositions in certain species
2. Made of cellulose and deposited with silica forming a frustule with two overlapping theca
3. Contains chitin as the primary component with calcium carbonate deposition
4. Made of pectin embedded with silica, showing a pill-box arrangement of valves
1. Composed entirely of peptidoglycan with siliceous depositions in certain species
2. Made of cellulose and deposited with silica forming a frustule with two overlapping theca
3. Contains chitin as the primary component with calcium carbonate deposition
4. Made of pectin embedded with silica, showing a pill-box arrangement of valves
Subtopic: Kingdom Protista: Chrysophytes |
67%
Level 2: 60%+
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The Protistan group which forms siliceous shells and constitutes major part of marine plankton is
1. Dinoflagellates
2. Euglenoids
3. Chrysophytes
4. Slime moulds
1. Dinoflagellates
2. Euglenoids
3. Chrysophytes
4. Slime moulds
Subtopic: Kingdom Protista: Chrysophytes |
78%
Level 2: 60%+
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The cell wall of diatoms is embedded with silica and thus the walls are indestructible.
1. True
2. False
1. True
2. False
Subtopic: Kingdom Protista: Chrysophytes |
95%
Level 1: 80%+
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Select the correct alternate:
1. Rod shaped bacteria are called: [Bacillus / Coccus]
2. Which metabolism is unique to archaebacteria? [Nitrogen fixation / Methanogenesis]
3. Citrus canker is caused by a: [Virus / Bacterium]
4. Diatoms and desmids are: [Chrysophytes / Dinoflagellates]
5. The outer most covering of the body of Euglena is: [Cellulosic cell wall / protein rich pellicle]
6. The spores of slime moulds are dispersed by: [air currents / water currents]
7. Sometimes, bacteria produce spores under: [favourable conditions / unfavourable conditions]
8. What type of protozoan is Trypanosoma? [Ciliated / Flagellated]
9. Red tides are associated with: [Gonyaulax / Gelidium]
10. Most abundant bacteria in nature are: [Chemosynthetic autotrophs / Heterotrophs]
11. Malarial parasite is a: [Flagellated protozoan / Sporozoan]
12. The 'chief producers' in the occans are: [Diatoms / Dinoflagellates]
1. Rod shaped bacteria are called: [Bacillus / Coccus]
2. Which metabolism is unique to archaebacteria? [Nitrogen fixation / Methanogenesis]
3. Citrus canker is caused by a: [Virus / Bacterium]
4. Diatoms and desmids are: [Chrysophytes / Dinoflagellates]
5. The outer most covering of the body of Euglena is: [Cellulosic cell wall / protein rich pellicle]
6. The spores of slime moulds are dispersed by: [air currents / water currents]
7. Sometimes, bacteria produce spores under: [favourable conditions / unfavourable conditions]
8. What type of protozoan is Trypanosoma? [Ciliated / Flagellated]
9. Red tides are associated with: [Gonyaulax / Gelidium]
10. Most abundant bacteria in nature are: [Chemosynthetic autotrophs / Heterotrophs]
11. Malarial parasite is a: [Flagellated protozoan / Sporozoan]
12. The 'chief producers' in the occans are: [Diatoms / Dinoflagellates]
Subtopic: Kingdom Monera: Introduction | Kingdom Monera: Bacterial Cell Structure | Kingdom Monera: Bacterial Life Process | Kingdom Monera: Bacterial Classification | Kingdom Protista: Introduction | Kingdom Protista: Chrysophytes | Kingdom Protista: Dinoflagellates | Kingdom Protista: Euglenoids | Kingdom Protista: Slime Moulds | Protozoa |
Level 4: Below 35%
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