Environment and Ecology TNPSC Group 1 Questions

Environment and Ecology MCQ Questions

13.

If water pollution continues at its present rate it will eventually

A.

stop water cycle

B.

prevent precipitation

C.

makes O2 molecule unavailable to water plant

D.

make nitrate unavailable to water plant

ANSWER :

C. makes O2 molecule unavailable to water plant

14.
Automobile air pollution is due to
A.
Nitrogen and Oxygen
B.
Oxygen
C.
Nitrogen
D.
Carbon dioxide and carbon monoxide
ANSWER :
D. Carbon dioxide and carbon monoxide
15.
Epoxy resins are used as
A.
insecticides
B.
motto repellants
C.
adhesive
D.
detergents
ANSWER :
C. adhesive
16.
The total organic matter present in an ecosystem is referred as
A.
Biomass
B.
Biosphere
C.
Biome
D.
Biocoenosis
ANSWER :
A. Biomass
17.
Suppose in a balanced green forest the number of tigers was doubled. This would gradually
A.
increase primary carnivores
B.
increase the biomass of herbivores
C.
decrease the biomass of herbivores
D.
decrease the biomass of producers
ANSWER :
C. decrease the biomass of herbivores
18.
Which of the following sequences is not a proper food chain?
A.
Grasshopper-> snake -> Hawk
B.
eagle-> snake -> toad -> slug
C.
Man->Fish->Meat->Plant juice
D.
Hawk->Chicken->Seeds
ANSWER :
C. Man->Fish->Meat->Plant juice