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1616
Which of the following water pollutant may contain organisms that cause dysentery?
  • A. Pesticides
  • B. Sewage
  • C. Industrial wastes
  • D. Fertilizers
  • E. Crude oil.
View Answer & Discuss WAEC 1993
1617
Which of the following is not an adaptation of plants or animals to desert environment?
  • A. Well developed tap root system
  • B. Small leaves with thick Epidermis
  • C. Stems with spike-like leaves
  • D. Metabolic waste in the form of uric acid in some animals
  • E. Broad leaves for storage
View Answer & Discuss WAEC 1993
1618
A climax community is characterised by
  • A. a stable composition of plant and animal species
  • B. rapid changes in the composition of species
  • C. constant changes in appearance of the habitat
  • D. different species occurring at different times
  • E. gradual change in animal population
View Answer & Discuss WAEC 1993
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1619
Which of the following is not a characteristic of overcrowding in plant and animal community?
  • A. Population outstripping available space
  • B. Population exceeding available food
  • C. Competition within the population
  • D. increase in primary production
  • E. Population increasing at the same rate as the birth rate
View Answer & Discuss WAEC 1993
1620
The use of predators or parasites to control pests in the farm is known as
  • A. predator control
  • B. chemical control
  • C. biological control
  • D. animal control
  • E. parasitic control
View Answer & Discuss WAEC 1993
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