Quiz  /  Ecology Class 12 MCQ Questions With Answers

  • 1. 
    The monkey would be a

  • decomposer
  • producer
  • primary consumer
  • secondary consumer

  • 2. 
    Which is an example of where primary succession could occur?

  • a glacier melts and exposes new rocks
  • natural fire burns a prairie
  • a corn field is abandoned and left to overgrow
  • flood covers a piece of land

  • 3. 
    Mice might grow in population and destroy the community by eating all of the berry bushes if

  • wolves and snakes were removed from the food web
  • another predator migrated in to the community
  • the snake population grew
  • none of these

  • 4. 
    Which organisms would be at the top or last trophic level?

  • plant
  • herbivore
  • omnivore
  • carnivore

  • 5. 
    A bee receives nectar from a flower and carries the pollen to other flowers:

  • predation
  • parasitism
  • mutualism
  • commensalism

  • 6. 
    Mistletoe grows and spreads on trees, taking their nutrients:

  • predation
  • parasitism
  • mutualism
  • commensalism

  • 7. 
    Barnacles do not affect whales as they grow, but receive the benefit of a food source. This is

  • parasitism
  • mutualism
  • commensalism
  • neutralism

  • 8. 
    Which event would not cause secondary succession?

  • forest fire
  • flooding of a valley
  • volcanic lava flow
  • tornado

  • 9. 
    What would happen within a few months after the formation of a volcanic island?

  • pioneer species would grow
  • no pioneer species would grow
  • trees and large plants would grow
  • rich, organic soil would be present

  • 10. 
    Introduced species disrupt ecosystems because they are a/an

  • Keystone Species
  • Endemic Species
  • Invasive Species
  • Native Species

  • 11. 
    These organisms are often not shown in a food chain, but are important for recycling nutrients

  • producers
  • decomposers
  • primary consumers
  • carnivores

  • 12. 
    A lion that eats a zebra that eats grass is a

  • primary consumer
  • secondary consumer
  • tertiary consumer
  • quaternary consumer

  • 13. 
    90% of the energy that gets lost as you move up a food pyramid or chain gets lost as

  • pollution to the environment
  • heat to the environment
  • energy for decomposers
  • gets recycled

  • 14. 
    What percentage of energy is passed on to the next trophic level?

  • 5%
  • 10%
  • 50%
  • 90%

  • 15. 
    What would be a good example of a primary consumer?

  • carnivore
  • detrivore
  • decomposer
  • herbivore
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