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O Level Biology Practice Test 339

Human Biology Quiz Answers PDF Download - 339

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Biology: Human Biology MCQs Quiz PDF Download

MCQ: In humans, the sensitivity of respiratory diseases, eyes, and air passages is experienced due to

A) carbon dioxide
B) lead
C) carbon monoxide
D) sulphur dioxide

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

A) sea water
B) fresh water
C) stagnant water
D) lime water

MCQ: Dull colored, smaller and non-scented flowers rely upon

A) insect-pollination
B) wind pollination
C) self pollination
D) cross pollination

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

A) low oxygen concentration
B) high oxygen concentration
C) low hydrogen concentration
D) high hydrogen concentration

MCQ: Carboxyhemoglobin is of

A) bright red
B) purplish red
C) bright pink
D) dark red

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