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

IGCSE O Level Biology MCQs (O Level) From Textbook

IGCSE O Level Biology Competitive Exam MCQs – Practice Test 21 (Chapter 7)

Effects of Human Activity on Ecosystem MCQs with Answers PDF Download – Test 21

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Learn Effects of Human Activity on Ecosystem Multiple Choice Questions (MCQs) with Answers PDF to strengthen educational technology. Download the Effects of Human Activity on Ecosystem MCQs PDF e-Book, Ch. 7-21 to study IGCSE O Level Biology Course. Practice Eutrophication: O Level Biology MCQs, Effects of Human Activity on Ecosystem quiz questions and answers PDF to understand ecology concepts. Download IGCSE O Level Biology Study App: Free Effects of Human Activity on Ecosystem MCQs App to study pollution: sewage as cause, conservation: fishing grounds, human biology, pesticides: o level biology career test to improve learning outcomes.

Free IGCSE O Level Biology Study App Download with MCQ: "Profuse growth of bacteria results in"; with answers: death of aquatic plants, death of algae, death of fish, and lesser nutrients in water. Solve Photolysis Quiz Questions, download Google e-Book (Free Chapter) to strengthen educational technology.

Effects of Human Activity on Ecosystem MCQs with Answers PDF Download: MCQ Quiz 21

MCQ 101: Profuse growth of bacteria results in:

  1. death of algae
  2. death of aquatic plants
  3. death of fish
  4. lesser nutrients in water

MCQ 102: Rapid growth of bacteria may:

  1. consume all the oxygen in water
  2. start living anaerobically
  3. kill the fish due to oxygen shortage in water
  4. all of above

MCQ 103: Fish can be conserved if:

  1. small fish are not caught
  2. indiscriminate fishing is done
  3. fishing period is extended
  4. fish hasn't laid eggs yet

MCQ 104: In humans, the sensitivity of respiratory diseases, eyes, and air passages is experienced due to:

  1. carbon dioxide
  2. lead
  3. carbon monoxide
  4. sulphur dioxide

MCQ 105: Substances which can remain in the soil for many years are known as:

  1. microorganisms
  2. insecticides
  3. dichloro-triphenyl dichloroethane
  4. dichloro-diphenyl trichloroethane

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