Chapter 20 - Man and Biology - Test 3

Biology Class 10
1. In honey bee the drones are:

1) None of the above   2) Workers

3) Male flies   4) Female flies
Biology Class 10
2. A large number of destructive organisms (insects etc.) are called:

1) All of the above   2) Pest

3) Insect   4) Butterflies
Biology Class 10
3. The substances whose presence in air, water or soil is harmful are termed as:

1) Wastes   2) Pollutants

3) Pollution   4) Harmful substances
Biology Class 10
4. Air pollution is mainly caused by:

1) All   2) Hydrocarbons

3) Dust   4) Sulfur dioxide
Biology Class 10
5. The ozone layer around the earth filter out:

1) Water vapours   2) Light

3) Bacteria   4) Ultraviolet rays
Biology Class 10
6. Rain containing the atmospheric pollutant of acid is known as:

1) None of the above   2) Pollutant rain

3) Acid rain   4) Good rain
Biology Class 10
7. Forest prevent excessive soil erosion during:

1) Flood & rain   2) Wind

3) Storm   4) None of the above
Biology Class 10
8. The protozoan as secondary consumers feed on these:

1) Organic wastes   2) All of the above

3) Parasite   4) Bacteria
Biology Class 10
9. Pathogenic micro organisms are:

1) Viruses   2) Fungi & protozoan

3) Bacteria   4) All
Biology Class 10
10. Common fungal human diseases are:

1) Hitoplasmosis   2) Athletes foot
3) Ring worm   4) All
Biology Class 10
11. Insulin produced by genetic engineering is exactly the same as ordinary _________ insulin.

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Biology Class 10
12. The term Biotechnology was introduced in _________.

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Biology Class 10
13. Acetone and methyl alcohol are among the _________ of other type of microbial fermentation.

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Biology Class 10
14. Decomposers are saprotrophs, which feed on faeces and _________ organism.

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Biology Class 10
15. Many bacteria and ________ are decomposers.

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