31). The culture of silkworms is 'known as
| A). Apiculture |
| B). Horticulture |
| C). Pisciculture |
| D). Sericulture |
|
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 |
|
33). The element which is rich in most leafy vegetables is
| A). Phosphorus |
| B). Zinc |
| C). Iron |
| D). Calcium |
|
34). Andbiotics can destroy viruses is
| A). TRUE |
| B). FALSE |
| C). partially true |
| D). partially wrong |
|
35). The best method of disposal of garbage is
| A). Vermiculture |
| B). Incineration |
| C). Land filling |
| D). Burning |
|
36). Sea weeds are an important source of
| A). Iron |
| B). Chlorine |
| C). Bromine |
| D). Iodine |
|
37). Polio is caused by
| A). Bacterium |
| B). Fungus |
| C). Virus |
| D). Insect |
|
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 |
|
39). All vital atmospheric processes leading to various climatic and weather conditions take place in the
| A). Troposphere |
| B). Ionosphere |
| C). Exosphere |
| D). Stratosphere |
|
40). The climatic changes soil erosion and decreased rainfall is due to
| A). ecosystem changes |
| B). deforestation |
| C). global warming |
| D). greenhouse effect |
|
