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Biology JAMB Past Questions

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621

When two heterozygotes mate, the dominant trait will appear in

  • A. the F1 generation only
  • B. the F2 generation only
  • C. both the F1 and F2 generations
  • D. neither the F1 nor F2 generation
View Answer & Discuss (7) JAMB 1991
622
Which of the following characters is NOT sex-linked?
  • A. River blindness
  • B. Baldness
  • C. Haemophilia
  • D. Colour blindness
View Answer & Discuss (5) JAMB 1991
623
The most important factors which influence an organism's way of life in its habitat are
  • A. the physicals and biotic enviroment
  • B. Food and water availability
  • C. temperature, water, light and predator-prey relationship
  • D. competition for food and spaces
View Answer & Discuss (17) JAMB 1991
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624
Organisms in an ecosystem are usually grouped according to their trophic level as
  • A. carnivores and epiphytes
  • B. consumers and parasites
  • C. producers and consumers
  • D. producers and saprophytes
View Answer & Discuss (1) JAMB 1991
625
The above diagram represents a competitive interaction between organism in communities I and II. Which of the following statements is CORRECT?
  • A. The population of I was higher than II at the beginning of the experiments
  • B. II was wiped out from the enviroment at the end of the experiments
  • C. The population of II was always lower than that of
  • D. The population of I was lower at the end of the experiment than at the beginning
View Answer & Discuss (3) JAMB 1991
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