IGCSE O Level Biology Quiz App | Effects of Human Activity on Ecosystem Quiz e-Book PDF | 3
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The "Effects of Human Activity on Ecosystem Quiz" App Download (iOS & Android): Non-toxic, unreactive chemicals used as cooling agents in refrigerators are known as; MCQ with answers: chloroflourocarbides, chloroflouro bicarbonates, chloroflourocarbonates, and chlorofluorocarbon. Study Structure of Cell & Protoplasm: Biology Quiz Questions, download Google Book (Free Chapter) for biology learning enhancement.

Effects of Human Activity on Ecosystem Exam Questions and Answers PDF Download: Test 3

MCQ 11: Problem of solid waste disposal can be reduced through:

  1. recycling
  2. lesser pollution
  3. more timber
  4. population control

MCQ 12: Non-toxic, unreactive chemicals used as cooling agents in refrigerators are known as:

  1. chloroflouro bicarbonates
  2. chloroflourocarbides
  3. chloroflourocarbonates
  4. chlorofluorocarbon

MCQ 13: Lives of organisms in ecosystem become threatened due to:

  1. urbanization
  2. industrialization
  3. introduction of toxics in ecosystem
  4. rapid housing

MCQ 14: If a substance accumulates in a body for a long time, it will be:

  1. passed out through egestion
  2. passed out through excretion
  3. become insoluble in water
  4. passed on to next consumer in food chain

MCQ 15: Most fertile layer of soil is:

  1. top layer
  2. organic layer
  3. middle layer
  4. lower layer

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