Q. No.Which of the following environmental conditions is MOST favourable for decomposition in an ecosystem?
| 1. | Low temperature and anaerobic conditions |
| 2. | High temperature and dry conditions |
| 3. | Warm and moist conditions with adequate oxygen |
| 4. | Cold and acidic conditions |
Subtopic: Decomposition |
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Decomposition of detritus in an ecosystem does not involve:
1. Catabolism
2. Leaching
3. Humification
4. Photosynthesis
1. Catabolism
2. Leaching
3. Humification
4. Photosynthesis
Subtopic: Decomposition |
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The breakdown of detritus into smaller particles by earthworm is a process called
1. humification
2. fragmentation
3. mineralisation
4. catabolism
Subtopic: Decomposition |
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Why is the earthworm referred to as the "farmer’s friend"?
| 1. | It feeds on crops, promoting plant diversity. |
| 2. | It helps in loosening soil and breaking down complex organic matter. |
| 3. | It removes pests from the soil and protects crops. |
| 4. | It produces fertilizers that increase crop yield. |
Subtopic: Decomposition |
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Decomposers are
1. Animalia and Monera
2. Protista and Animalia
3. Fungi and Plantae
4. Bacteria and Fungi
Subtopic: Decomposition |
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Which factor slows down the rate of decomposition in a particular climatic condition?
| 1. | High nitrogen and water-soluble substances in detritus |
| 2. | Warm and moist environment |
| 3. | Detritus rich in lignin and chitin |
| 4. | Increased microbial activity |
Subtopic: Decomposition |
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Decomposition results in the breakdown of complex organic matter into:
| 1. | Proteins used directly by top-level consumers |
| 2. | Complex carbohydrates and lignin-rich compounds |
| 3. | Inorganic substances such as carbon dioxide, water, and nutrients |
| 4. | Organic acids that never enter nutrient cycles |
Subtopic: Decomposition |
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The decomposition of organic matter in an ecosystem is influenced by several factors. The rate of decomposition will be highest in an environment with:
| 1. | Low temperature, dry conditions, and anaerobic soil. |
| 2. | Extreme heat, acidic soil, and low microbial diversity. |
| 3. | High light intensity, nitrogen-deficient soil, and low organic matter. |
| 4. | Warm temperature, high humidity, and adequate oxygen. |
Subtopic: Decomposition |
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In which of the following conditions will the rate of decomposition be the slowest?
| 1. | Detritus rich in lignin and chitin, low temperature, and anaerobic conditions |
| 2. | Detritus rich in nitrogen and sugars, warm and moist conditions |
| 3. | Detritus with high water content and favorable microbial activity |
| 4. | Detritus with low lignin content, high temperature, and abundant soil moisture |
Subtopic: Decomposition |
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Sometimes the term "detritivore" is used interchangeably with:
| 1. | decomposers | 2. | primary consumers |
| 3. | secondary consumers | 4. | autotrophs |
Subtopic: Decomposition |
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