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Biology 1983 JAMB Past Questions

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6
Which of the following elements are necessary for the formation of chlorophyll in a plant?
  • A. magnesium and iron
  • B. Calcium and potassium
  • C. Calcium and sulphur
  • D. Potasium and sulphur
  • E. Phosphorus and potassium
View Answer & Discuss (3) JAMB 1983
7
Which of the following statements is NOT true of mammalian erythrocytes?
  • A. They have haemoglobin
  • B. they appear yellow when looked at singly
  • C. They are disc shaped
  • D. The cell are more numerous than leucocytes
  • E. They have nuclei at maturity
View Answer & Discuss (3) JAMB 1983
8
In woody plants, grass and water vapour are transported across the stems by the
  • A. xylem fibres
  • B. medullary rays
  • C. sieve tubes
  • D. phloem fibres
  • E. phloem parenchyma
View Answer & Discuss (16) JAMB 1983
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9
Which of the following substance is not found in urine?
  • A. Water
  • B. Sodium chloride
  • C. Nitrogenous compounds
  • D. Calcium chloride
  • E. Nitrogenous salts
View Answer & Discuss (5) JAMB 1983
10
The kidneys of all vertebrates act as osmoregulators. This means that they
  • A. keep the composition of the plasma constant
  • B. regulate osmotic processes
  • C. control the volume of blood entering the kidneys
  • D. decrease the osmotic pressure of the blood
  • E. increase the osmotic pressure of blood
View Answer & Discuss (7) JAMB 1983
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