IGCSE O Level Biology MCQs (O Level) From Textbook

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IGCSE O Level Biology MCQs – Practice Test 16 (Chapter 7)

Effects of Human Activity on Ecosystem Notes Questions with Answers PDF Download – Test 16

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The Effects of Human Activity on Ecosystem Notes Questios and Answers PDF (Effects of Human Activity on Ecosystem Quiz Answers PDF e-Book) download Ch. 7-16 to study IGCSE O Level Biology Course. Solve Atmospheric Pollution MCQs, Effects of Human Activity on Ecosystem quiz answers PDF to learn online IGCSE courses. Download the IGCSE O Level Biology Notes App – Free Effects of Human Activity on Ecosystem Notes App to learn pollution: sewage as cause, pollution: smog as cause, pollution: inorganic wastes as cause, pollution causes career test for online colleges that offer financial aid.

The MCQ: If lead accumulation occurs for long in the body, the outcomes may include; "IGCSE O Level Biology Notes" App APK Download [Free] with answers: coma, death, and lead poisoning to learn online IGCSE courses. Practice Learning Biology Quiz Questions, download Kobo e-Book (Free Chapter) to learn online IGCSE courses.

Effects of Human Activity on Ecosystem Test Questions and Answers PDF Download: MCQ 16

MCQ: 76

If lead accumulation occurs for long in the body, the outcomes may include

  1. death
  2. coma
  3. lead poisoning
  4. all of above
MCQ: 77

Hydrogen sulfide (H2S) and ammonia (NH3) are produced from

  1. the chimneys of factories
  2. use of chlorofluorocarbon in foam packaging
  3. decomposition of organic compounds by anaerobic bacteria
  4. treatment of acidic wastes with alkalis
MCQ: 78

An inversion of smoke escape occurs if

  1. layer of warm air continually replaces the cold air
  2. layer of warm air acts like a lid and does not allow the cold air and smoke to escape
  3. hot air and smoke react to form smog
  4. cold air acts as a lid and prevents escape of smoke and sulphur dioxide
MCQ: 79

Compounds which tend to accumulate in bodies are

  1. passed on to final consumers
  2. are not excreted from the bodies
  3. may contain lead and mercury
  4. all of above
MCQ: 80

Risks of skin cancer is increased if

  1. more sun bathing is done
  2. the chlorofluorocarbons are lowered
  3. the greenhouse effect is lowered
  4. more ultraviolet light penetrates the Earth

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

Effects of Human Activity on Ecosystem Notes App

O Level Biology Notes Apps (iOS & Android)

O Level Biology Notes App

SAT Biology Notes Apps (iOS & Android)

SAT Biology Notes App

Phylum Notes Apps (Android & iOS)

Phylum Notes App