The minimum number of components required for an ecosystem to survive:
A. Producer and primary consumer
B. Producer and decomposer
C. Primary consumer and decomposer
D. Primary and secondary consumer
E. Producer and secondary consumer
The significance of ecosystem lies in:
A. Flow of energy
B. Cycling of matters
C. Both (a) & (b)
D. None of the above
Carnivores are:
A. Usually primary consumers
B. Usually secondary consumers
C. Usually decomposers rather than consumers
D. Usually secondary or tertiary consumers
The incorporation of minerals by microbes is called:
A. Mineralization
B. Humification
C. Nutrient immobilization
D. Microbe immobilization
In a food chain, man is:
A. Producer
B. Primary consumer only
C. Primary and Secondary consumer
D. Secondary consumer only
Biosphere refers to:
A. Plants of a particular area
B. Area occupied by living beings
C. Plants of world
D. Spherical plants
A food chain consists of:
A. Producers and primary consumers
B. Producer, herbivores and carnivores
C. Producers, carnivores and decomposers
D. Producers, consumers and decomposers
Green plants constitute:
A. The first trophic level
B. The second trophic level
C. The third trophic level
D. The fourth trophic level
The number of primary producers within a specified area world be maximum in:
A. Pond ecosystem
B. Grassland ecosystem
C. Desert ecosystem
D. Forest ecosystem
