1992 - WAEC Biology Past Questions and Answers - page 4
31
Which of the following substances cannot control the growth of harmful microoganisms?
A
Antibiotics
B
Hypertonic salt solution
C
disinfectants
D
isotonic sugar solution
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32
Which of the following is the underling principle in the adoption of biological control of pests?
A
Knowledge of agricultural practices by the farmer
B
relationship between plants and animals
C
the presence of poisonous chemicals in the farm
D
the relative population of plants and animals in the farm
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33
The following agencies are responsible for conservation in Nigeria except
A
Forestry Department
B
Nigerian Conservation Society
C
Games Reserve Authority
D
Nigerian Red Cross Society
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34
The largest game reserve in Nigeria is the
A
Kainji Game Reserve in Niger State
B
Zamfara Forest Reserve in Sokoto State
C
Yankari Game Reserve in Bauchi State
D
Borgu Game Reserve in Niger State
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35
The table below indicates the result of an experiment during which grains of different colours in two maize cobs were counted
Maize Cob Colours of Maize Grains
White Pink Red
l. 30 60 30
II. 50 99 49
Which of the following ratios agrees with the result?
Maize Cob Colours of Maize Grains
White Pink Red
l. 30 60 30
II. 50 99 49
Which of the following ratios agrees with the result?
A
9:3:3
B
1:2:1
C
1:3:1
D
2:1:1
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36
One of the factors that must be considered for sate blood transfusion is
A
social class of the donor
B
age of the recipient
C
rhesus factors of the donor and the recipient
D
nationality of the donor
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37
One of the major criticisms against Mendelian laws is that they do not recognise that
A
one trait is often controlled by many pairs of genes
B
single factor inheritance is never a reality
C
complete dominance is always possible
D
incomplete dominance is not possible
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38
Identical twins inherit their genes from
A
the same ovum and different sperms
B
the same sperm and different ova
C
different sperms and many ova
D
the same ovum and the same sperm
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39
The offspring produced when pure strains interbreed is descried as
A
dominance
B
phenotype
C
allele
D
genotype
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40
Which of the following diseases or disorders can be prevented by the application of the knowledge of heredity through marriage counseling ?
A
Sickle cell anaemia
B
Haemophilia
C
Diabetes mellitus
D
Colour blindness
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