Q. No.The term "detritivore" includes
1. decomposers
2. primary consumers
3. secondary consumers
4. autotrophs
Which of the following promotes the process of decomposition?
1. Warm and moist environment
2. low temperature
3. Anaerobiosis
4. Lignin and chitin-rich detritus
The rate of decomposition of detritus is slow when
1. It contains lignin, chitin, tannins and cellulose
2. Temperature is more than 25°C
3. It contains proteins
4. There is good aeration
Pheretima and its close relatives derive nourishment from:
1. Sugarcane roots
2. Decaying fallen leaves and soil organic matter
3. Soil insects
4. Small pieces of fresh fallen leaves of maize
What does the process of leaching refers to-
| 1. | Accumulation of a dark coloured amorphous substance |
| 2. | Organic solvents reabsorbed by the plants |
| 3. | Inorganic solvents get precipitated out of the soil |
| 4. | Water soluble inorganic nutrients go down into the soil horizon and get precipitated as unavailable salts. |
Why do we call the earthworm as the farmer’s friend?
| 1. | It eats the pests. |
| 2. | It prevents the growth of weeds. |
| 3. | It makes the soil fertile by burrowing. |
| 4. | It helps in the breakdown of complex organic matter as well as in loosening of the soil. |
Decomposition would be fast if the detritus contains-
1. Cellulose
2. Lignin and chitin
3. Nitrogen and water soluble sugars
4. Cellulose and pectin
In the process of decomposition ‘catabolism’ is performed by-
1. Earthworms
2. Bacteria
3. Bacteria and fungi
4. Fungi
Which of the following does not affect rate of decomposition?
1. Substrate composition
2. Soil moisture
3. Temperature of soil
4. CO₂
What is the process by which Detritivores break down the detritus into smaller particles.?
1. Degradation
2. Decomposition
3. Fragmentation
4. Leaching
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