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Effects of Human Activity on Ecosystem MCQ App Download - IGCSE O Level Biology e-Book

IGCSE O Level Biology MCQs - Chapter 7

Effects of Human Activity on Ecosystem Trivia Questions & Answers PDF Download - 20

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Effects of Human Activity on Ecosystem Exam Questions and Answers PDF Download: Test 20

MCQ: 96

People may become blind due to

  1. Lead poisoning
  2. Mercury poisoning
  3. Chlorofluorocarbons exposure
  4. Ozone depletion
MCQ: 97

Foul smelling gases include

  1. Hydrogen Sulfide (H2S) only
  2. Ammonia (NH3)
  3. Carbon dioxide (CO2) only
  4. Hydrogen Sulfide (H2S) and Ammonia (NH3)
MCQ: 98

Volcanic eruptions, biological decay and forest fires releases

  1. Carbon monoxide in air
  2. carbon dioxide in air
  3. sulpher dioxide in air
  4. ammonia in air
MCQ: 99

Aluminum (Al) salts may become fatal to fish if allowed to react with

  1. soil in the rivers
  2. soil in the lakes
  3. fossil fuel
  4. gaseous pollutants like acid rains
MCQ: 100

Fish die as a result of water pollution due to

  1. less BOD
  2. more tolerance range for oxygen
  3. narrow tolerance range for oxygen
  4. zero tolerance range for oxygen

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Effects of Human Activity on Ecosystem Apps (Android & iOS)

Effects of Human Activity on Ecosystem App

O Level Biology Apps (Android & iOS)

O Level Biology App

MCAT Biology Apps (Android & iOS)

MCAT Biology App

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