In This Post we are  providing Chapter-14 Ecosystem  NCERT MCQ for Class 12 Biology which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS  can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.

NCERT MCQ ON ECOSYSTEM

Q1. Ecosystem may be defined as

  1. A species along with environment
  2. Plants found in water
  3. Plants found on land
  4. Call plants and animals species along with environment

Answer:4

Q2. A pond / lake is

  1. A biome
  2. Unnatural ecosystem
  3. An artificial ecosystem
  4. Community of plants and animals only

Answer:2

Q3. Biome is

  1. The fauna of an ocean
  2. The Flora of land
  3. Communities of organisms interacting with one another
  4. The part of the earth and its atmosphere which is inhabited by living organisms

Answer:3

Q4. Grassland biome for its maintenance requires

  1. Periodic fire
  2. Intensive grazing
  3. Mowing
  4. All the above

Answer:4

Q6. Primary consumers in the detritus food chain are

  1. Herbivorous
  2. Bacteria and fungi
  3. Insect Larva, nematodes
  4. All the above

Answer:2

Q7. Total organic matter present in an ecosystem is called

  1. Biomass
  2. Biome
  3. Litter
  4. Food

Answer:1

Q8. Detritus food chain in comparison to grazing food chain is

  1. Generally longer
  2. Generally equal
  3. Generally shorter
  4. None of these

Answer:3

Q9. Putrefying organisms are

  1. Producer organisms
  2. Reducer organisms
  3. Consumer organisms
  4. Parasitic organisms

Answer:2

Q10. The most important organisms for an ecosystem are

  1. Herbivorous
  2. Carnivorous
  3. Green plants
  4. Protozoa

Answer:3

Q11. A peacock eats snakes which eat frog these eat hoppers which in turn thrive on leaves of the plants, the peacock is

  1. Primary consumer
  2. Secondary consumer
  3. Decomposer
  4. Apex of the food pyramid

Answer:4

Q12. A food chain is

  1. Group of organisms which eat the same type of food
  2. Animals eating animals eating
  3. Series of plants / animals which are interrelated in the form of organisms being eaten as food by the other
  4. None of these

Answer:3

Q13. A food chain consists of

  1. Producers
  2. Consumers
  3. Decomposers
  4. Producers and Consumers

Answer:4

Q14. Trophic leaves in a food chain are formed by

  1. Producers
  2. Consumers
  3. Decomposers
  4. All the above

Answer:4

Q15. Food chain always starts with

  1. Photosynthesis
  2. Respiration
  3. Nitrogen fixation
  4. Decay

Answer:1

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