Biology Past Questions

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786

Secondary thickening in dicotyledonous stem is controlled by the

A. xylem
B. phloem
C. cambium
D. pericycle

View Answer & Discuss (2) JAMB 1995

787

2H₂ → 2H₂ + O_2(g). The equation above represents a part of the light stage of photosynthesis. Which of the following must be presents for this reaction to occur?

A. Enzyme and light energy
B. Carbondioxide and light energy
C. Light energy and cholorphyll
D. Chlorophyll and enzyme

View Answer & Discuss (2) JAMB 1995

788

In an experiment to investigate the effect of nitrogen on the growth of plants, the substrate should be a medium of

A. washed sand
B. saw dust
C. cow dung
D. clay soil

View Answer & Discuss (19) JAMB 1995

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789

Which vitamin plays an important role in blood clotting?

A. vitamin A
B. Vitamin K
C. Vitamin B₁₂
D. Vitamin C

View Answer & Discuss (1) JAMB 1995

790

The mammalian organ which acts both as a digestive and as an endocrine organ is the

A. oesophagus
B. liver
C. pancreas
D. spleen

View Answer & Discuss (1) JAMB 1995

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