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Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
4476

Tooth decay is usually caused by___________

  • A. undigested and absorbed food
  • B. eating a limited amount of sweetened food.
  • C. the bacteria ín the mouth that metabolize sugar to acids
  • D. eating a lot of proteinous foods
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4477

The conversion of ammonium salts into nitrates is called_______

  • A. putrefaction
  • B. denitrification
  • C. fixation
  • D. nitrification
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4478

The salinity of a brackish habitat________

  • A. increases immediately after rainfall
  • B. increases at the end of the rain
  • C. decreases with an increase in the number of organisms
  • D. increases during the dry season
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4479

If 90 ants are found in a field with a total area of 100 m. what is the population density of the ants?

  • A. 0.09
  • B. 0.90
  • C. 9.00
  • D. 90.00
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4480

The complex relationship between the members of a community and their physical environment is known as________

  • A. commensalism
  • B. symbiosis
  • C. saprophytism
  • D. ecology
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Download WAEC May/June App - Get all past questions and answers, 100% offline - 43208
WAEC offline past questions - with all answers and explanations in one app - Download for free
WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709
Post-UTME Past Questions - Original materials are available here - Download PDF for your school of choice + 1 year SMS alerts