1999 - WAEC Biology Past Questions and Answers - page 4
31
Use the information below on factors required during photosynthesis to answer the two questions
I. CO2 II. Chlorophyll III. Water IV. ATP V NADPH2 The factors required for the dark phase of photosynthesis are
A
III and IV only
B
III and V only
C
III, IV and V only
D
IV and V only
32
In water- culture experiments the culture solutions are protected from sunlight in order to
A
control the temperature of the culture solution
B
prevent algae from growing in the solution
C
prevent the minerals in the solution from being destroyed
D
allow the minerals to be used up at room temperature
33
The importance of a balanced diet is to
A
maintain constant size of an animal
B
provide good taste in the food
C
increase the effectiveness of digestion
D
provide good health for an individual
34
The dentition of a herbivore is distinct from that of other animals due to the presence of
A
diastema
B
cusps on molar teeth
C
canines
D
ridges on molar teeth
35
Which of the following statements is true?
A
Ptyalin acts on proteins to give amino acid
B
Lactase acts on maltose to give amino acid
C
Pepsin acts on proteins to give peptide
D
Peptide acts on starch to give maltose
36
Which of the following organisms can be found in fresh water habitat?
A
Sargassum and dog fish
B
Red mangrove and pond skater
C
Sargassum and red mangrove
D
Spirogyra and pond skater
37
Which of the following is not a biotic factor?
A
Parasites
B
Predators
C
Grazers
D
Pressure
38
Desert plants are usually called
A
hydrophytes
B
mesophytes
C
xerophytes
D
sporophytes
39
The secchi disc is used to measure
A
speed of flow of water
B
specific gravity of water
C
turbidity of water
D
depth of water
40
Soil factors in an ecosystem are referred to as
A
topographic
B
climatic
C
biotic
D
edaphic
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