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ECOLOGY MCQs

Total Questions : 48 | Page 5 of 5 pages
Question 41. Study of interactions between organisms and their environment
  1.    niche
  2.    community 
  3.    ecology
  4.    ecosystem
 Discuss Question
Answer: Option C. -> ecology
Question 42. Non-living factor that affects an ecosystem
  1.    biotic factor
  2.    abiotic factor
  3.    food chain 
  4.    biome
 Discuss Question
Answer: Option B. -> abiotic factor
Question 43. Where an organism lives
  1.    habitat
  2.    niche 
  3.    heterotrogh
  4.    biosphere
 Discuss Question
Answer: Option A. -> habitat
Question 44. Organisms that breaks down and absorbs nutrients from dead organisms
  1.    consumer
  2.    trophic level
  3.    decomposer
  4.    species
 Discuss Question
Answer: Option C. -> decomposer
Question 45. Which of the following leads to a decrease in biodiversity?
  1.    protection of ecosystems
  2.    pollution control
  3.    selective cutting
  4.    introduction of exotic or invasive species
 Discuss Question
Answer: Option D. -> introduction of exotic or invasive species
Question 46. What percentage of energy is passed on to the next trophic level?
  1.    5%
  2.    10%
  3.    50%
  4.    90%
 Discuss Question
Answer: Option B. -> 10%
Question 47. Nitrogen fixation processes nitrogen from which of the following sources?
  1.    lightning
  2.    fertilizers
  3.    dead plants
  4.    atmosphere
 Discuss Question
Answer: Option D. -> atmosphere
Question 48. A collection of organisms that belong to different populations but all live in the same area and interact with one another
  1.    Population
  2.    Ecosystem
  3.    Community
  4.    Ecosphere
 Discuss Question
Answer: Option C. -> Community

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