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2001 - WAEC Biology Past Questions and Answers - page 5

41

Loam is the best type of soil for crop production because

A
it has a high percentage of clay which prevents leaching
B
it has high humus content
C
it is porous and has good water retention capacity
D
gravels which obstruct implements are absent from it
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42

The mineral needed for the formation of haemoglobin is

A
magnesium
B
iron
C
phosphorus
D
calcium
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43

A-person who fails to detect the bitter taste of a substance swallowed, is more likely to have

A
dead taste buds on the tongue
B
avoided the substance from contacting the back of his/her tongue
C
fewer taste buds on the tongue
D
swallowed the substance without any water
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44

Which of the following solutions is suitable for removing chlorophyll in a green leaf?

A
Million’s reagent
B
Methylated spirit
C
Benedict solution
D
Fehling’s solution
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45

Which of the following is not promoted by high wind speed?

A
Rill erosion
B
Weathering of parent rock
C
Breeding of plant
D
Opening of stomata
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46

Micro-organisms which break down dead organisms and absorb their contents are called

A
decomposers
B
consumers
C
parasites
D
commensals
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47

The substances recycled in the soil by the activities of micro-organisms during the decay of dead organisms
are first utilized by the

A
carnivores
B
herbivores
C
scavengers
D
autotrophs
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48

Which of the following associations can upset the balance of nature?

A
Epiphitism
B
Parasitism
C
Symbiosis
D
Saprophytism
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49

Which of the following groups of factors do the Agama lizards compete for? I. Space II. Food III. Mates

A
Space and food only
B
Space and mates only
C
Food and mates only
D
Space, food and mates
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50

Which of the following structures in a housefly aids in the transmission of diseases in man?

A
Hairs
B
Spiracles
C
Antennae
D
Wings
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