O Level Courses

Chapter 7: IGCSE O Level Biology Exam Tests

IGCSE O Level Biology MCQs - Chapter 7

Effects of Human Activity on Ecosystem Quiz Questions and Answers PDF - 3

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Effects of Human Activity on Ecosystem Exam Questions and Answers PDF Download: Quiz 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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Effects of Human Activity on Ecosystem App (Android & iOS)

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

O Level Biology App (Android & iOS)

O Level Biology App (iOS & Android)

A level Biology App (Android & iOS)

A level Biology App (Android & iOS)

Cell Biology App (Android & iOS)

Cell Biology App (iOS & Android)