The primary productivity is minimum in the following ecosystem:
A. Tropical rainforest
B. Temperate grassland
C. Tropical deciduous forest
D. Desert shrub
Ecosystem creates:
A. Food chains
B. Food web
C. Both (a) & (b)
D. None of the above
The decomposers in an ecosystem constitute the following trophic level:
A. T1
B. T3
C. T5
D. T4
Ecological pyramids are of:
A. Two types
B. Three types
C. Four types
D. Five types
Which one of the following is a reversible source of energy?
A. Petroleum
B. Coal
C. Nuclear fuel
D. Trees
What is contributed from the outer space in an ecosystem?
A. All the atmospheric gases
B. Only carbon, hydrogen and oxygen
C. Energy only
D. All the above components
The zooplanktonic forms are:
A. Primary consumers
B. Secondary consumers
C. Carnivores
D. Primary producers
The cycling of elements in an ecosystem is called:
A. Chemical cycle
B. Biogeochemical cycle
C. Geological cycle
D. Geochemical cycle
The number of producers and consumers in an ecosystem is mutually controlled by a:
A. Productivity control
B. Food chain mechanism
C. Feedback mechanism
D. Any of these
