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Biology Past Questions

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4711

The diagram above is an illustration of the growth of a plant in a water culture. After a few days, the solution turned green and the plant died. Use this to answer this question.

The death of the plant was likely caused by?

  • A. excess supply of nutrients to the plant
  • B. inadequate supply of water to the plant
  • C. algal growth in the solution that used up the nutrients
  • D. inability of the plant to make food due to lack of sunlight
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4712

Which of the following factors is not necessary for photosynthesis?

  • A. water
  • B. carbon (IV) oxide
  • C. wind
  • D. sunlight
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4713

Autotrophic nutrition is a process whereby an organism obtains food 

  • A. by utilizing its store energy
  • B. by synthesizing simple substances using energy
  • C. from other organisms in exchange for some products
  • D. in a synthesized form, from other living organisms
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4714

The process that takes place at the light stage of photosynthesis is?

  • A. splitting of water molecules to form hydrogen ions
  • B. reduction of carbon (IV) oxide to form carbohydrate
  • C. formation of two molecules of phosphoglyceric acid
  • D. breaking down of ATP molecules to produce energy
View Answer & Discuss (1) WAEC 2021
4715

The diagram above is an illustration of the foot of an animal.

The adaptation of this type of foot is that it is?

  • A. used as a bait to catch fish in water
  • B. used as a paddle for swimming
  • C. effective in scratching the soil for food
  • D. used for killing prey in water
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