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676
Pawpaw seeds collected from a tree with many desirable agronomic qualities did not give rise to plants of desirable character as the parent because
  • A. seeds are not reliable for propagating plants
  • B. uncontrolled out-crossing can introduced unwanted variability
  • C. vegetative propagation is best form of reproduction of all crop
  • D. seeds were not physiologically mature at the harvest
View Answer & Discuss (1) JAMB 1992
677
Woman do not suffer from colour blindness because
  • A. the trait is sex-linked
  • B. only men are colour blind
  • C. the genes are recessive and sex-linked
  • D. the genes occur on both the X and Y chromosomes
View Answer & Discuss (2) JAMB 1992
678
The hereditary materials of the cell is
  • A. the R N A
  • B. protein
  • C. the D N A
  • D. carbohydrate
View Answer & Discuss (8) JAMB 1992
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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679
An example of plant adaptation to a xerophytic environment is represented by the development of
  • A. fleshy tissue and reduced leaves
  • B. broad canopy and extensive surface root system
  • C. thick barks and broad leaves
  • D. rough leaves and shallow root system
View Answer & Discuss JAMB 1992
680
Which of the following factors is LEAST likely to affect the animals living in a fresh water habitat?
  • A. Turbidity
  • B. Temperature
  • C. pH
  • D. Salinity
View Answer & Discuss (6) JAMB 1992
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Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts
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