Q. No.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
Which one of the following statements is correct for secondary succession?
| 1. | It occurs on a deforested site |
| 2. | It follows primary succession |
| 3. | It is similar to primary succession except that it has a relatively slow pace |
| 4. | All of the above |
1. mangroves
2. tropical rainforests
3. alpine forests
4. temperate forests
1. temperate deciduous forests
2. alpine forests
3. scrub forests
4. tropical rain forests
Stability of ecosystem depends upon:
1. Primary
2. Interchange between producers and consumers
3. Number of producers
4. Number of consumers
Intermediate community between pioneer and climax communities is called:
1. seral community
2. biotic community
3. temporary community
4. ecosure
Ten per cent law of energy transfer in a food chain is given by:
1. Schimper
2. Elton
3. Haeckel
4. Lindemann
The ultimate source of energy for living beings is:
1. Sunlight
2. ATP
3. Fats
4. Carbohydrates
Which of the following species are restricted to an area?
1. Sympatric species
2. Sibling species
3. Allopatric species
4. Endemic species
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