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Biology 1990 JAMB Past Questions

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21
If a ring of bark and phloem is removed from a stem, the
  • A. plant dies immediately
  • B. plant dies after two days
  • C. movement of food is not affected
  • D. movement of minerals is hardly affected
View Answer & Discuss (20) JAMB 1990
22
Transpiration can be measured with a
  • A. photometer
  • B. hygrometer
  • C. potometer
  • D. barometer
View Answer & Discuss (1) JAMB 1990
23
Excretory products responsible for the red, purple and blue colours of flowers are called
  • A. alkaloid
  • B. tannins
  • C. anthocyanins
  • D. resins
View Answer & Discuss (8) JAMB 1990
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24
Etiolation is caused by the influence of
  • A. minerals salt
  • B. water
  • C. carbondioxide
  • D. light
View Answer & Discuss (13) JAMB 1990
25
Muscles are indirectly attached to bones by means of
  • A. ligaments
  • B. membranes
  • C. tendons
  • D. sutures
View Answer & Discuss (1) JAMB 1990
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