31). The culture of silkworms is 'known as
A). Apiculture |
B). Horticulture |
C). Pisciculture |
D). Sericulture |
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32). The percentage of water content in the human blood plasma normally varies from
A). 60-64 |
B). 70-75 |
C). 80-82 |
D). 91-92 |
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33). The element which is rich in most leafy vegetables is
A). Phosphorus |
B). Zinc |
C). Iron |
D). Calcium |
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34). Andbiotics can destroy viruses is
A). TRUE |
B). FALSE |
C). partially true |
D). partially wrong |
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35). The best method of disposal of garbage is
A). Vermiculture |
B). Incineration |
C). Land filling |
D). Burning |
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36). Sea weeds are an important source of
A). Iron |
B). Chlorine |
C). Bromine |
D). Iodine |
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37). Polio is caused by
A). Bacterium |
B). Fungus |
C). Virus |
D). Insect |
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38). "Ozone" as such
A). protects the earth from ultraviolet sunrays |
B). is catalyst in a number of chemical reactions |
C). is utilised in greenhouse farming |
D). is a gas which is hazardous when inhaled |
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39). All vital atmospheric processes leading to various climatic and weather conditions take place in the
A). Troposphere |
B). Ionosphere |
C). Exosphere |
D). Stratosphere |
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40). The climatic changes soil erosion and decreased rainfall is due to
A). ecosystem changes |
B). deforestation |
C). global warming |
D). greenhouse effect |
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