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IGCSE O Level Biology Certification Exam Tests

IGCSE O Level Biology Practice Test 339

Human Biology Quiz PDF: Questions and Answers - 339

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Human Biology Questions and Answers PDF Download: Quiz 339

MCQ 1691:

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 1692:

PH (power of Hydrogen) of about 8 is characteristic of

  1. sea water
  2. fresh water
  3. stagnant water
  4. lime water
MCQ 1693:

Dull colored, smaller and non-scented flowers rely upon

  1. insect-pollination
  2. wind pollination
  3. self pollination
  4. cross pollination
MCQ 1694:

Fish can come to the surface of the water for air-breathing in waters of

  1. low oxygen concentration
  2. high oxygen concentration
  3. low hydrogen concentration
  4. high hydrogen concentration
MCQ 1695:

Carboxyhemoglobin is of

  1. bright red
  2. purplish red
  3. bright pink
  4. dark red

IGCSE O Level Biology Exam Prep Tests

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Human Biology App (Android & iOS)

Human Biology App (Android & iOS)

O Level Biology App (Android & iOS)

O Level Biology App (iOS & Android)

Zoology App (Android & iOS)

Zoology App (Android & iOS)

Molecular Biology App (Android & iOS)

Molecular Biology App (iOS & Android)