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IGCSE O Level Biology MCQs – Practice Test 9 (Chapter 7)

Effects of Human Activity on Ecosystem MCQs with Answers PDF Download – Test 9

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The "Effects of Human Activity on Ecosystem MCQs" App Download: Nitrates (NO3-1) and phosphates (PO4-3) reach underground water with; MCQ with answers: fertilizers washed away by rain water, acid rains, decomposition of organic compounds by anaerobic bacteria, and decomposition of organic compounds by aerobic bacteria. Solve Vegetative Reproduction in Plants Quiz Questions, download Google e-Book (Free Chapter) to enhance biology literacy.

Effects of Human Activity on Ecosystem MCQs with Answers PDF Download: MCQ Quiz 9

MCQ 41: Miscarriages in women may be due to intake of:

  1. carbon dioxide
  2. polluted water
  3. water containing dioxins
  4. DDT

MCQ 42: Nitrates (NO3-1) and phosphates (PO4-3) reach underground water with:

  1. acid rains
  2. fertilizers washed away by rain water
  3. decomposition of organic compounds by anaerobic bacteria
  4. decomposition of organic compounds by aerobic bacteria

MCQ 43: Central heating systems can be run through:

  1. more deforestation
  2. burning of garbage
  3. lesser incinerators
  4. cooling water pipelines

MCQ 44: Loss of control of hand and feet occurs due to:

  1. lead poisoning (Pb)
  2. sulfur dioxide (SO2)
  3. nitrogen oxide (NO)
  4. carbon dioxide (CO2)

MCQ 45: Metals is produced as waste in industries like:

  1. skiing
  2. mining
  3. electroplating
  4. digging

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