The living organisms of all ecosystems collectively constitute:

Related Mcqs:

1. All the living organisms on the earth interacting with atmosphere constitute:

   A. Biosphere
   B. Community
   C. Biome
   D. Association

2. Which group of three living organisms, given below is a link in food chain: Green plants …. Hawk:

   A. Grasshopper, frog, snake
   B. Grasshopper, rat, snake
   C. Millipedes, centipedes, sparrow
   D. Earthworm, hen, rat

3. The study of interaction between living organisms and environment in a specific area is the study of:

   A. Photobiology
   B. Phytogeography
   C. Ecosystem
   D. Phytosociology

4. The lower most layer of atmosphere in which man and other living organisms exist is called:

   A. Thermosphere
   B. Mesosphere
   C. Stratospheres
   D. Troposphere

5. The study of interactions between living organisms and environment is called:

   A. Ecosystem
   B. Phytogeography
   C. Ecology
   D. Phytosociology

6. The taiga ecosystems lie in the:

   A. Alpine zone
   B. Sub-alpine zone
   C. Temperate zone
   D. Sub-tropical zone

7. Short and simple food chains are rare in the world and may be found in simple ecosystems like:

   A. Savanna
   B. Tundra
   C. Grassland
   D. Desert

8. Fragile ecosystems cover:

   A. The arid and semi-arid zones of the world, arid savannas of the tropics, the slopes of the mountains of the tropics
   B. And subtropics and forest areas of the developing world under shifting cultivation have been described as ‘Fragile Ecosystems’
   C. Because their equilibrium appears to be easily upset and because they become ecologically degraded if certain forms of land use
   D. All of the above

9. In an aquatic environment, microscopic animals and plants are collectively known:

   A. Commensals
   B. Herbivores
   C. Fauna and flora
   D. Planktons

10. In an aqueous environment, the microscopic animals are collectively called:

    A. Herbivores
    B. Carnivores
    C. Planktons
    D. Fauna and flora