2018 - WAEC Biology Past Questions and Answers - page 3
21
The source of energy required by plants during food production is
A
Photosynthesis
B
Chlorophyll
C
Sunlight
D
Microorganisms
22
One major difference between plant and animals nutrition is the ability of plants to synthesize
A
Food for plants and animals
B
Water for plants
C
Water for animals
D
Food for plants only
23
By what process is starch converted into maltose?
A
Hydrolysis
B
Condensation
C
Translocation
D
Photosynthesis
24
The ascent of water in tall trees is mainly due to
A
adhesive forces
B
transpiration pull
C
root pressure
D
cohesive forces
25
The duodenum of a person was surgically removed. Which of the following substances would have their digestion affected?
A
starch and protein only
B
starch and lipids
C
starch, peptones and maltose
D
starch, protein and lipids
26
Which of the following dental formulae represents the dentition in rabbits?
A
\(I\frac{2}{1}\) \(C\frac{0}{0}\) \(P\frac{3}{2}\) \(M\frac{3}{3}\)
B
\(I\frac{2}{2}\) \(C\frac{1}{1}\) \(P\frac{2}{2}\) \(M\frac{3}{3}\)
C
\(I\frac{1}{2}\) \(C\frac{0}{0}\) \(P\frac{2}{3}\) \(M\frac{3}{3}\)
D
\(I\frac{2}{1}\) \(C\frac{0}{1}\) \(P\frac{3}{2}\) \(M\frac{3}{3}\)
27
The diagram above is an illustration of an experimental set-up to demonstrate a property of soil. The property of soil demonstrated is
A
particle size
B
capillarity
C
colour
D
texture
28
Which of the following statements would be a correct observation at the end of the experiment? Water moves
A
highest in sandy soil
B
lowest in loamy soil
C
to the same level in all soil types
D
highest in clayey soil
29
The most important factor(s) that influence(s) the ecological niche of an organism is/ are the
A
water, light and predator-prey relationship
B
food and water availability
C
physical environment
D
competition for food and space
30
The diagram above is an illustration of organisms in an air-tight aquarium.The most important factor needed by the organisms is
A
light energy
B
low humidity
C
oxygen
D
nitrate
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