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

IGCSE O Level Biology MCQs (O Level) From Textbook

IGCSE O Level Biology Exam MCQs – Practice Test 12 (Chapter 7)

Effects of Human Activity on Ecosystem Notes Questions with Answers PDF Download – Test 12

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Learn Effects of Human Activity on Ecosystem Notes Questios and Answers PDF for animal biology studies. Download the Effects of Human Activity on Ecosystem Quiz Answers PDF e-Book, Ch. 7-12 to study IGCSE O Level Biology Course. Solve Soil Erosion MCQs, Effects of Human Activity on Ecosystem quiz answers PDF for animal biology studies. Download Effects of Human Activity on Ecosystem Study App: Free IGCSE O Level Biology Notes App to learn causes of pollution: biology, pesticides: o level biology, pollution: bod and eutrophication career test to enhance online interaction.

Free Effects of Human Activity on Ecosystem App with MCQ: "Flood may be an outcome if"; with answers: eroded soil gets deposited in rivers and streams, trees do not retain water, and water levels rise rapidly in rivers. Practice Soil Erosion Quiz Questions, download Kobo e-Book (Free Chapter) for animal biology studies.

Effects of Human Activity on Ecosystem Test Questions and Answers PDF Download: MCQ 12

MCQ 56: Flood may be an outcome if:

  1. trees do not retain water
  2. eroded soil gets deposited in rivers and streams
  3. water levels rise rapidly in rivers
  4. all of above

MCQ 57: Incomplete burning of fuel causes:

  1. decrease in annual rain fall
  2. decay of fossil fuels
  3. rapid sheet erosion
  4. pollution

MCQ 58: Pests may be not be destroyed through:

  1. Parasites
  2. Insecticides
  3. Herbicides
  4. Pesticides

MCQ 59: Process by which harmful substances are added to environment is called as:

  1. Silting
  2. Pollution
  3. Desertification
  4. Flooding

MCQ 60: The higher the BOD, the:

  1. lower the water pollution
  2. lesser the bacteria in it
  3. more the water pollution
  4. the more the air pollution

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