Ecology and Environment NDA Questions

NDA BIOLOGY

Ecology and Environment MCQ Questions


7.
An ecosystem consists of
A.
Only soil and water
B.
Only plants and animals
C.
Only producers and consumers
D.
Biotic and abiotic components
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ANSWER :
D. Biotic and abiotic components
8.
Which of the following is NOT a type of ecosystem?
A.
Forest ecosystem
B.
Volcanic ecosystem
C.
Marine ecosystem
D.
Grassland ecosystem
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ANSWER :
B. Volcanic ecosystem
9.
In a food chain, which trophic level has the MAXIMUM energy?
A.
Producers (First trophic level)
B.
Primary consumers (Second trophic level)
C.
Secondary consumers (Third trophic level)
D.
Tertiary consumers (Fourth trophic level)
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ANSWER :
A. Producers (First trophic level)
10.
The 10% Law of energy transfer in a food chain was given by
A.
Lindemann
B.
Tansley
C.
Haeckel
D.
Odum
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ANSWER :
A. Lindemann
11.
A food web is more stable than a food chain because
A.
It operates without decomposers
B.
It has fewer organisms
C.
It has multiple pathways for energy flow
D.
It involves only herbivores
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ANSWER :
C. It has multiple pathways for energy flow
12.
Which of the following represents a correct food chain?
A.
Eagle → Snake → Frog → Grass
B.
Grass → Grasshopper → Frog → Snake → Eagle
C.
Snake → Frog → Grasshopper → Grass
D.
Grasshopper → Grass → Frog → Eagle
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ANSWER :
B. Grass → Grasshopper → Frog → Snake → Eagle