IGCSE O Level Biology Study App | Effects of Human Activity on Ecosystem MCQs e-Book PDF

IGCSE O Level Biology MCQs (O Level) From Textbook

IGCSE O Level Biology Competitive Exam MCQs – Practice Test 13 (Chapter 7)

Effects of Human Activity on Ecosystem MCQs with Answers PDF Download – Test 13

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Effects of Human Activity on Ecosystem MCQs with Answers PDF Download: MCQ Quiz 13

MCQ 61: Exhaust motor vehicle is the main source of:

  1. manganese
  2. carbon monoxide
  3. sulphur dioxide
  4. nitrogen oxide

MCQ 62: Death of fish in lakes and rivers in some countries has been attributed to:

  1. gaseous pollutants
  2. air toxics
  3. acid rains
  4. pollution

MCQ 63: Smoke and fog combine to form:

  1. smog
  2. fossil
  3. acid rains
  4. water pollution

MCQ 64: Narrow tolerance of oxygen (O2) is found in:

  1. humans
  2. plants
  3. mammals
  4. fish

MCQ 65: Leukemia can be cured through:

  1. periwinkle plant
  2. pyrethrum
  3. chrysanthemum
  4. herbicides

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