Human Biology Notes App | IGCSE O Level Biology Notes e-Book PDF
IGCSE O Level Biology MCQs (O Level) From Textbook

IGCSE O Level Biology Competitive Exam MCQs – Mock Test 339

Human Biology Notes Questions with Answers PDF Download – Test 339

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Free "Human Biology Notes" App Download (Android & iOS): In humans, the sensitivity of respiratory diseases, eyes, and air passages is experienced due to; MCQ with answers: lead, carbon dioxide, sulphur dioxide, and carbon monoxide. Learn Effects of Human Activity on Ecosystem Questions and Answers, Apple Book to download free chapter to strengthen biology preparation.

Human Biology MCQs – Mock Test 339 PDF Download

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 Notes App & eBook – Human Biology Competitive Exam

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Free Human Biology Notes App – Download Android & iOS Apps

Human Biology Notes App

Free O Level Biology Notes App – Download iOS & Android Apps

O Level Biology Notes App

Free Zoology Notes App – Download Android & iOS Apps

Zoology Notes App

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