The term biosphere is used for the zone of earth where life exists:
A. On the lithosphere surface
B. In the hydrosphere
C. In the lithosphere, hydrosphere and atmosphere
D. In the lithosphere and hydrosphere
Pond is an example of:
A. Artificial ecosystem
B. Forest ecosystem
C. Natural ecosystem
D. Grassland ecosystem
In an aquatic environment, microscopic animals and plants are collectively known:
A. Commensals
B. Herbivores
C. Fauna and flora
D. Planktons
Ecosystem may be defined as:
A. Group of plants, which act
B. Group of organisms which
C. Functional unit for ecological studies
D. None of these
The earth could have sustained more population if all the people would have been:
A. Pure vegetarians
B. Milk drinker and vegetarian
C. Non-vegetarians
D. Dependent upon milk, egg and vegetarian habit
Prairies and steppes are parts of the natural regions called:
A. Temperate grasslands
B. Tropical grasslands
C. Prairie grasslands
D. Steppes grasslands
Nepenthes is a:
A. Primary producer
B. Consumer
C. Primary producer and consumer
D. None of the above
The pyramid that cannot be inverted in a stable ecosystem is the pyramid of:
A. Energy
B. Number
C. Biomass
D. All of these
Which of the following habitats is most unsuitable for primary productivity:
A. Meadow
B. Forested river bank
C. Cave
D. Pond
