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Biology 1991 WAEC Past Questions

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1
The cell is a functional unit of living organisms because
  • A. multicellular organisms are made up of cells
  • B. all cells in a multicellular organism function as a single cell
  • C. the function of a multicellular organism is the sum total of the functions of its constituent cells
  • D. the function of a single cell is superior to that of the multicellular organism
  • E. the cells of a multicelullar organism are similar in structure
View Answer & Discuss (14) WAEC 1991
2
The organelle which eliminate water from the body of protozoa is
  • A. plasma membrane
  • B. contractile vacuole
  • C. cell wall
  • D. protoplasm
  • E. nucleus
View Answer & Discuss (4) WAEC 1991
3
Spirogyra is regarded as a multicellular plant because
  • A. its cells are linked together by cytoplasmic strands
  • B. its cells are joined to form organs
  • C. the cylindrical cells are linked end to end
  • D. the filaments consist of one cell only
  • E. it is an algea containing large vacuoles
View Answer & Discuss (7) WAEC 1991
WAEC offline past questions - with all answers and explanations in one app - Download for free
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4
The mechanism of gaseous exchange in living organisms is essentially by
  • A. osmosis
  • B. inhalation
  • C. diffusion
  • D. exhalation
  • E. breathing
View Answer & Discuss (4) WAEC 1991
5
Which of the following statement is correct about diffusion?
  • A. it involves movement of water molecules only
  • B. Molecules move from a region of higher concentration to a region of lower concentration
  • C. differentially permeable membrane must be present for diffusion to occur
  • D. It involves when a solute can no longer dissolve in a solvent of only solute molecules into the Bowman's capsule
  • E. It occurs when a solute can no longer dissolve in a solvent
View Answer & Discuss (7) WAEC 1991
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WAEC offline past questions - with all answers and explanations in one app - Download for free
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WAEC Past Questions, Objective & Theory, Study 100% offline, Download app now - 24709