O Level Courses

Chapter 7: IGCSE O Level Biology Exam Tests

IGCSE O Level Biology MCQs - Chapter 7

Effects of Human Activity on Ecosystem Multiple Choice Questions (MCQ) PDF - 2

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Effects of Human Activity on Ecosystem Questions and Answers PDF Download: MCQ Quiz 2

MCQ 6:

Bacteria grow and multiply rapidly in

  1. aerobic environment
  2. anaerobic environment
  3. water
  4. soil
MCQ 7:

Gaseous pollutants may be carried to other countries to

  1. form acid rain
  2. cause acidification of soil
  3. form alkaline rain
  4. cause water pollution
MCQ 8:

Non-renewable sources do not include

  1. fossil fuels
  2. minerals
  3. air
  4. water
MCQ 9:

Desertification is caused due to

  1. overgrazing
  2. topsoil is eroded
  3. rapid water evaporation from the soil
  4. all of above
MCQ 10:

Forests can not be conserved if

  1. timber trees are cut down worldwide
  2. timber trees are cut down selectively
  3. if rate of plantation exceeds rate of cutting trees
  4. new seedlings are planted and grown trees are cut

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