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96
The organ through which food and oxygen are supplied to the human embryo and which also prevents harmful materials from reaching the embryo is the
  • A. amnion
  • B. uterus
  • C. placenta
  • D. umbilical cord
  • E. fallopian tube
View Answer & Discuss (8) JAMB 1980
97
A true fruit is formed from
  • A. a fertilized ovary and other floral parts
  • B. a fertilized ovary
  • C. a fertilized ovary and calyx
  • D. a fertilized ovary and fleshy receptacle
  • E. an unfertilized ovary and other floral part
View Answer & Discuss (4) JAMB 1980
98
Water is required for seed germination to take place because it
  • A. activates the enzymes
  • B. softens the testa
  • C. liberates energy for growth
  • D. permits radicle growth
  • E. allow oxygen to diffuse into the seed
View Answer & Discuss (3) JAMB 1980
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99
A fresh Kolanut weighing 1g was put into salt solution. After 3 hour, the kolanut weighed 1.2g. This simple experiment demonstration that
  • A. the salt solution is more concentrated that the cell sap of the kolanut
  • B. the cell sap of the kolanut is more concentrated than the salt solution
  • C. the salt solution has the same concentration as the cell sap of the kolanut
  • D. kolanut cell can multiply in water
  • E. the kolanut lost some water molecules to the salt solution
View Answer & Discuss (17) JAMB 1980
100

The joint between the atlas and axis vertebrae allows for

  • A. rotatory movement only
  • B. up and down or nodding movements only
  • C. rotatory and nodding movements
  • D. no movement at all
  • E. slight movement
View Answer & Discuss (18) JAMB 1980
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