Effects of Human Activity on Ecosystem MCQ App | IGCSE O Level Biology MCQ e-Book PDF | 6
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IGCSE O Level Biology MCQs – Practice Test 6 (Chapter 7)

Effects of Human Activity on Ecosystem MCQ with Answers PDF Download – Test 6

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Effects of Human Activity on Ecosystem MCQ with Answers PDF Download: Quiz 6

MCQ 26: In terms of tolerance range for oxygen (O2), Tubifex worms and fish are:

  1. differ
  2. alike
  3. approximately same
  4. opposite

MCQ 27: Disadvantages of pesticides includes:

  1. healthier crops
  2. higher yield of crops
  3. non-biodegradable pesticides
  4. availability of more food

MCQ 28: Profuse growth of algae occurs due to:

  1. hydrogen sulphide in water
  2. nitrates and phosphates in water
  3. carbon dioxide in water
  4. chlorine in water

MCQ 29: In which category of resources, metal lies:

  1. renewable resource
  2. non-renewable resource
  3. artificial resource
  4. element

MCQ 30: Cinchona is used in making of:

  1. quinine
  2. morphine
  3. pyrethrum
  4. DDT

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