Effects of Human Activity on Ecosystem Notes App | IGCSE O Level Biology Notes e-Book PDF | 8
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IGCSE O Level Biology MCQs – Practice Test 8 (Chapter 7)

Effects of Human Activity on Ecosystem Notes Questions with Answers PDF Download – Test 8

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Effects of Human Activity on Ecosystem Test Questions and Answers PDF Download: MCQ 8

MCQ 36: High concentrations of carbon monoxide (CO):

  1. reduces capacity of blood transport
  2. reduces capacity of oxygen transportation through blood in the body
  3. is caused due to incomplete fossil decay
  4. is caused due to smog formation

MCQ 37: Cadmium is an example of:

  1. organic waste
  2. inorganic waste
  3. nitrogenous waste
  4. carbonic waste

MCQ 38: Fossil fuels and minerals are examples of:

  1. renewable resources
  2. non-renewable resources
  3. artificial resources
  4. pollutants

MCQ 39: Over a period of time, mosquitoes have developed resistance to:

  1. dichlorodiphenyl trichloroethane (DDT)
  2. biochemical oxygen demand (BOD)
  3. dioxins
  4. eutrophication

MCQ 40: Which one is a characteristic of fossil fuels:

  1. cannot be recycled
  2. can be recycled
  3. can be reused
  4. can be reprocessed

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