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Biology Past Questions

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381
Blood circulation in a mammalian is said to be double because
  • A. it passes twice through the heart in a complete circuit
  • B. it moves in both arteries and veins
  • C. it circulates in both the heart and other organs
  • D. the heart contain auricles and ventricles
View Answer & Discuss (2) JAMB 1986
382

Which is the correct order of water loss from the leaf? 1 Mesophyll 2 Veins 3 Substomatals cavity 4 Stomata

  • A. 3 → 2 → 1 → 4
  • B. 2 → 3 → 1 → 4
  • C. 2 → 1 → 3 → 4
  • D. 1 → 2 → 3 → 4
View Answer & Discuss (5) JAMB 1986
383
The aperture between the left auricle and the left ventricle is guarded by the
  • A. auricles valve
  • B. tricupid valve
  • C. ventricles valve
  • D. bicuspid valve
View Answer & Discuss (5) JAMB 1986
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384

A major limitation in the use of the potometer for measuring the rate of transpiration is that

  • A. it is made of breakable glass materials
  • B. it measures the rate of water intake
  • C. it measure the rate of water loss throuh the stern only
  • D. the movement of the air buble in the potometer cannot be timed accurately
View Answer & Discuss (11) JAMB 1986
385

Which of the following statement is NOT correct with respect to inhalation in mammals? The

  • A. intercostal muscles contract
  • B. diaphragm is raised
  • C. ribs are raised
  • D. Pressure of the thoracic cavity decreases
View Answer & Discuss (14) JAMB 1986
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