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Biology 1983 JAMB Past Questions

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31
In a positive phototropic response of a coleoptile, the region of greatest curvature is brought about by the
  • A. movement of auxins away from the region of curvature
  • B. even distribution of auxins in all parts of the coleoptile
  • C. inhibition of growth by auxins in the region f smaller curvature
  • D. concentration of auxins in the region of curvature
  • E. absence of auxins in the coleoptile
View Answer & Discuss (3) JAMB 1983
32
The tuber cassava is NOT a stem tuber because it
  • A. Is distended with food reserve
  • B. Has an aerial shoot portion
  • C. Has other structure that could be called root
  • D. Lacks axillary buds
  • E. Has a bark over its stored food
View Answer & Discuss (1) JAMB 1983
33

The function of the ossicles (malleus, incus and stapes) in the mammalian ear is

  • A. Transmission of vibrations
  • B. Regulation of pressure
  • C. Support of the inner ear
  • D. Maintenance of balance during motion
  • E. Secretion of oil
View Answer & Discuss (11) JAMB 1983
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34
Which of the following instruments is used for determining turbidity of water?
  • A. Thermometer
  • B. secchi disc
  • C. rain guage
  • D. Hydrometer
  • E. Wind vane
View Answer & Discuss (2) JAMB 1983
35
Which of the following is NOT a characteristic of monocot plants?
  • A. Occurrence of secondary thickening
  • B. Parallel venation
  • C. Scattered vascular bundles
  • D. Floral parts arranged in threes
  • E. Perianth is usually insignificant
View Answer & Discuss (2) JAMB 1983
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