NEET / AIPMT / AIIMS / KCET / JIPMER Exams – Biology – Environmental Issues -Test

Question 1 of 10

1. Question

Warm ocean surge of the Peru Current reoccurring every 5-8 years or so in the East Pacific of South America is widely known as [1998]

Gulf Stream
El Nino
Aye Aye
Magnox

Question 2 of 10

2. Question

Which one of the following organisms is used as indicator of water quality? [1998]

Chlorella
Azospirillum
Escherichia
Biggiatoa

Question 3 of 10

3. Question

Phosphate pollution is caused by [1997]

Phosphate rocks only
Agricultural fertilizers only
Sewage and phosphate rocks
Sewage and agricultural fertilizers

Question 4 of 10

4. Question

Sewage drained into water bodies kill fishes because [1996]

Excessive carbon dioxide is added to water
It gives off a bad smell
It removes the food eaten by fish
It increases competition with fishes for dissolved oxygen

Question 5 of 10

5. Question

When huge amount of sewage is dumped into river, its B.O.D, will [1995]

Increase
Decrease
Sharply decrease
Remain unchanged

Question 6 of 10

6. Question

In Minamata Bay Japan, the animals which remained free from Minamata disease, are [1995]

Pigs
Rabbits
Dogs
Cats

Question 7 of 10

7. Question

Highest DDT deposition shall occur in [1994]

Phytoplankton
Sea Gull/Birds
Crab
Eel

Question 8 of 10

8. Question

Disease caused by eating fish found in water contaminated with industrial waste having mercury is [1994]

Minamata disease
Bright’s disease
Hashimoto’s disease
Osteosclerosis

Question 9 of 10

9. Question

Drawback of DDT as pesticide is [1994]

It becomes ineffective after sometime
It is less effective than others
It is not easily/rapidly degraded in nature
Its high cost

Question 10 of 10

10. Question

Fish die in water bodies polluted by sewage due to [1994]

Pathogens
Clogging of gills by slit
Reduction in oxygen
Foul smell