Identify the correct set of statements with regard to properties of humus
(a) | Highly resistant to microbial action |
(b) | Dark-colored amorphous substance |
(c) | End product of detritus food chain |
(d) | Reservoir of nutrients |
(e) | Undergoes decomposition very fast |
Choose the correct answer from the options given below:
1. | (a), (b) and (d) only | 2. | (a),(b) and (e) only |
3. | (a) and (b) only | 4. | (b) , (c) and (a) |
Which of the following are not correct regarding decomposition of wastes ?
(a) | Low temperature inhibits decomposition |
(b) | Warm and moist environment favours the process |
(c) | The process is anaerobic |
(d) | It is slower if detritus is rich in proteins and carbohydrates |
(e) | Detritus is degraded into simpler inorganic substance by fungal and bacterial enzymes |
Choose the correct answer from the options given below:
1. | (b) and (c) only | 2. | (c), (a) and (d) only |
3. | (c) and (d) only | 4. | (c), (d) and (e) only |
The primary producers of the deep-sea hydrothermal vent ecosystem are
1. coral reefs
2. green algae
3. chemosynthetic bacteria
4.blue-green-algae
The breakdown of detritus into smaller particles by earthworm is a process called:
1. Catabolism
2. Humification
3. Fragmentation
4. Mineralisation
Decomposers are
1. Animalia and Monera
2. Protista and Animalia
3. Fungi and Plantae
4. Bacteria and Fungi