1999 - WAEC Agriculture Past Questions and Answers - page 4
31
Root-knot disease in tomatoes is caused by
A
virus
B
nematode
C
bactrium
D
fungus
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32
Callosobruchus maculatus is a common pest of
A
maize
B
cowpea
C
rice
D
millet
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33
Gummosis disease of citrus is caused by
A
aphids
B
fungi
C
white flies
D
bacteria
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34
Which of the following weeds is dispersed by wind?
A
pig weed (boerhavia diffusa)
B
goat weed (ageratum conizoides)
C
hausa throns (acanthospermum hispidum)
D
tridax (tridax procumbens)
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35
The characteristic symptoms of mosaic disease of crops is usually observed on
A
roots
B
leaves
C
stems
D
fruits
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36
The correct sequence in the processes of crop improvement is
A
introduction-slection-breeding
B
breeding-selection-intruduction
C
breeding-introduction-selection
D
introduction-breeding-selection
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37
A condition which a gene does manifest observation characteristics in the presence of its dominant allele is known as
A
dominance
B
mutation
C
recessiveness
D
homozygosity
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38
Gestation period is defined as the time
A
of fusion of the sperm and the egg
B
between conception and parturition
C
of release of ovum from the ovary
D
of the birth of the young animal
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39
The hormone responsible for milk let down in female farm animals is
A
testosterone
B
follicle stimulting hormone
C
oxytocin
D
androgen
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40
The adult male cattle is called
A
bull
B
ram
C
boar
D
buck
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