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Biology Past Questions

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1731
What is the difference between viviparous and oviparous animals?
  • A. Possession of yolked eggs
  • B. Laying of unfertilized eggs
  • C. Possession of yolkless eggs
  • D. Protection of eggs from predator
  • E. Laying and brooding of eggs
View Answer & Discuss (2) WAEC 1990
1732
The structure of the embryo which develops and makes contact with the uterine
wall is known as the
  • A. umbilical cord
  • B. placenta
  • C. allantois
  • D. amnion
  • E. chorion
View Answer & Discuss (13) WAEC 1990
1733
The organ located in the mammalian abdominal cavity just below the diaphragm
and lying on top of the stomach is the
  • A. bladder
  • B. intestine
  • C. liver
  • D. pancreas
  • E. chorion
View Answer & Discuss (3) WAEC 1990
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1734
Which of the following is the effect of using artificial pollination in plant breeding?
  • A. Production of healthy crops
  • B. Improvement of the variety of crops
  • C. Making crops susceptible to diseases
  • D. Lengthening the maturity time of crops
  • E. Encouraging competition amongst crops
View Answer & Discuss WAEC 1990
1735
A dry indehiscent fruit containing one seed and possessing a hairy pappus is described as
  • A. a nut
  • B. a drupe
  • C. a cypsela
  • D. a follicle
  • E. an achene
View Answer & Discuss (1) WAEC 1990
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