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Biology 2013 JAMB Past Questions

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21
The blood circulatory system of vertebrates consists of
  • A. heart, arteries, capillaries and veins
  • B. heart, aorta, capillaries and veins
  • C. heart, aorta, arteries and veins
  • D. heart, vena cava, arteries, and veins
View Answer & Discuss JAMB 2013
22
A plant tissue that carries water and mineral salts is the
  • A. cambium
  • B. xylem
  • C. cortex
  • D. phloem
View Answer & Discuss JAMB 2013
23

Which of the following helps in the clotting of blood?

  • A. Red blood cells
  • B. White blood cells
  • C. Plasma
  • D. Platelets
View Answer & Discuss (7) JAMB 2013
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24
The part of the mammalian skin involved in excretion is the
  • A. sweat glands
  • B. malpighian layer
  • C. sebaceous gland
  • D. horny layer
View Answer & Discuss (3) JAMB 2013
25
Which of the following forms about 55% of the volume of the blood in man?
  • A. leucocytes
  • B. platelets
  • C. plasma
  • D. erythrocytes
View Answer & Discuss (3) JAMB 2013
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