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451
Nitrifying bacteria are important because they
  • A. release nitrogen to the atmosphere
  • B. convert atmospheric nitrogen to ammonia
  • C. combine ammonia with nitrgen
  • D. oxidize ammmonium salt to nitrates
View Answer & Discuss (1) JAMB 1987
452
The process by which lime is added to clay soil is known as
  • A. sedimentation
  • B. flocculation
  • C. leaching
  • D. manuring
View Answer & Discuss (8) JAMB 1987
453
The function of ribosomes in cell is
  • A. protein synthesis
  • B. starch synthesis
  • C. transport of materials
  • D. lipid storage
View Answer & Discuss (3) JAMB 1988
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454
Which of the following structures is common to Euglena, white blood cell and Amoeba?
  • A. Vacuole
  • B. Cell wall
  • C. Cilia
  • D. Cell membrane
View Answer & Discuss (1) JAMB 1988
455
The term 'Thyllophyta'refers to
  • A. ferns and mosses
  • B. algae and fungi
  • C. mosses and liverworts
  • D. fungi and ferns
View Answer & Discuss (4) JAMB 1988
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