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

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

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Free Effects of Human Activity on Ecosystem MCQs App Download with MCQ: "Miscarriages in women may be due to intake of"; with answers: polluted water, carbon dioxide, water containing dioxins, and ddt. 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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