Q. Which of the following is the largest part of human brain ?
1) Cerebrum
2) Cerebellum
3) Brain stem
4) Corpus callosum
Q. In human eye, the image of an object is formed at -
1) Cornea
2) Iris
3) Retina
4) Pupil
Q. The factors which are most important in determining the impact of anthropogenic activities on environment are -
1) Population, affluence per person, land available per person
2) Population, affluence per person and the technology used for exploiting resources
3) Atmospheric conditions, population and forest cover
4) Population, forest cover and land available per person
Q. The bio-fertilizer used as a supplementary food for the cattle, especially for milking bovines is -
1) Azolloa
2) Rhizobium
3) Azospirillum
4) Azotobacter
Q. Name one non-biodegrabable waste which may pollute the earth to dangerous levels of toxicity, if not handled properly.
1) DDT
2) CFC
3) Radioactive substances
4) PAN
Q. In a lake polluted with pesticides, which one of the following will contain the maximum amount of pesticides?
1) Small fish
2) Microscopic animals
3) Big fish
4) Water birds
Q. Name the substance whose accumulation in pelicans of Lake Michigan led to the formation of thin shells of their eggs -
1) CFC
2) PAN
3) DDT
4) PAC
Q. Which of the following is non-biodegradable?
1) Animal bones
2) Nylon
3) Tea leaves
4) Wool
Q. Animal dung is ......... waste.
1) Biodegradable
2) Non-biodegradable
3) Hazardous
4) Toxic
Q. A natural phenomenon that becomes harmful due to pollution is -
1) global warming
2) ecological balance
3) greenhouse effect
4) desertification
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