Ecosystem, Pollution and Biodiversity CDS Questions

CDS Environmental Geography

Ecosystem, Pollution and Biodiversity MCQ Questions


1.
Which of the following organisms are called producers in an ecosystem?
A.
Herbivorous animals that consume plants
B.
Green plants and certain bacteria that synthesise food
C.
Fungi that decompose dead organic matter
D.
Carnivorous animals at the top of the food chain
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ANSWER :
B. Green plants and certain bacteria that synthesise food
2.
The process by which green plants convert solar energy into chemical energy is called:
A.
Respiration
B.
Transpiration
C.
Photosynthesis
D.
Chemosynthesis
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ANSWER :
C. Photosynthesis
3.
Which one of the following is NOT a producer in an ecosystem?
A.
Phytoplankton
B.
Cyanobacteria
C.
Zooplankton
D.
Green algae
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ANSWER :
C. Zooplankton
4.
In aquatic ecosystems, the dominant primary producers are:
A.
Fish
B.
Phytoplankton
C.
Mangroves
D.
Aquatic mammals
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ANSWER :
B. Phytoplankton
5.
Chemosynthetic bacteria found near deep-sea hydrothermal vents act as producers because they:
A.
Use sunlight to make food
B.
Consume dead organic matter
C.
Derive energy from oxidation of inorganic chemicals
D.
Feed on other bacteria
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ANSWER :
C. Derive energy from oxidation of inorganic chemicals
6.
Animals that feed exclusively on plants are called:
A.
Carnivores
B.
Omnivores
C.
Decomposers
D.
Herbivores
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ANSWER :
D. Herbivores