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Biology Solved MCQs For Public Service Commission Exams
Q.1: Number of spiracles present in cockroach is——?
Q.2: Of the following, which one is a contagious disease?
- Lungs cancer
Q.3: Number of spiracles present in the thorax of cockroach is——?
Q.4: Which of the following promotes growth in plants?
- Calvin cycle
- Both of these
- None of these
Q.5: When abdomen expands, the number of spiracles open is——-?
Q.6: Which of the following animals has a respiratory system with one way flow of the air through the lungs, and the air is renewed after inspiration?
Q.7: The maximum amount of oxygen which normal human blood absorbs and carries at sea level is —- per 100 ml of blood.?
- 10 ml
- 20 ml
- 30 ml
- 40 ml
Q.8: Oxygen contents per liter of air is——?
- 10 ml
- 100 ml
- 200 ml
Q.9: Haemoglobin can be almost completely oxygenated by an oxygen pressure of —– of mercury.?
- 10 mm
- 60 mm
- 10 cm
- 100 mm
Q.10: Water is —– times viscous than air?