CUET PG PYQs for Ecology and Environment with Solutions: Practice CUET PG Previous Year Questions

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Ecology and Environment is an important topic in the Environmental Sciences section in CUET PG exam. Practising this topic will increase your score overall and make your conceptual grip on CUET PG exam stronger.

This article gives you a full set of CUET PG PYQs for Ecology and Environment with explanations for effective preparation. Practice of CUET PG Environmental Sciences PYQs including Ecology and Environment questions regularly will improve accuracy, speed, and confidence in the CUET PG 2026 exam.

CUET PG PYQs for Ecology and Environment with Solutions

1.
In most of terrestrial lakes, phosphorous is a limiting nutrient. Phosphorous is not an essential nutrient but present in high amounts compared to other nutrients. Which of the following is most appropriate?
- Both (A) and (R) are correct and (R) is the correct explanation of (A)
- Both (A) and (R) are correct but (R) is not the correct explanation of (A)
- (A) is correct but (R) is not correct
- (A) is not correct but (R) is correct
View Solution

2.
Match List I with List II:
LIST I (Aquaculture system) LIST II (Potential Environmental Impact)
A. Coastal Pond I. Transfer of diseases
B. Inland Pond II. Introduction of exotic species
C. Mollusk Culture III. Destruction of mangroves
D. Net Pen/Cage IV. Degradation of land
Choose the correct answer from the options given below:

LIST I (Aquaculture system)	LIST II (Potential Environmental Impact)
A. Coastal Pond	I. Transfer of diseases
B. Inland Pond	II. Introduction of exotic species
C. Mollusk Culture	III. Destruction of mangroves
D. Net Pen/Cage	IV. Degradation of land

(A) - (III), (B) - (II), (C) - (IV), (D) - (I)
(A) - (I), (B) - (IV), (C) - (III), (D) - (II)
(A) - (III), (B) - (IV), (C) - (II), (D) - (I)
(A) - (IV), (B) - (I), (C) - (II), (D) - (III)

View Solution

3.
How can the ecological footprint of the entire human population be estimated?
- Existing population density and multiply this by area of habitable land
- Calculating the ratio of population growth rate and carrying capacity
- Add up all ecologically productive land on the planet and divide by the population
- Population growth prediction by the logistic model
View Solution

4.
Match List I with List II:
LIST I LIST II
A. Fragmentation I. Degradation of detritus into simple inorganic substances by bacteria and fungi
B. Humification II. Release of nutrients from humus by microbial action
C. Catabolism III. Breakdown of detritus by earthworms into smaller particles
D. Mineralisation IV. Dark coloured substances, highly resistant to microbial action
Choose the correct answer from the options given below:

LIST I	LIST II
A. Fragmentation	I. Degradation of detritus into simple inorganic substances by bacteria and fungi
B. Humification	II. Release of nutrients from humus by microbial action
C. Catabolism	III. Breakdown of detritus by earthworms into smaller particles
D. Mineralisation	IV. Dark coloured substances, highly resistant to microbial action

(A) - (III), (B) - (IV), (C) - (II), (D) - (I)
. (A) - (IV), (B) - (III), (C) - (I), (D) - (II)
(A) - (III), (B) - (IV), (C) - (I), (D) - (II)
(A) - (I), (B) - (II), (C) - (III), (D) - (IV)

View Solution

5.
The main limiting factors for both plants and animals on a global scale are:
A. Fire
B. pH
C. Temperature
D. Moisture
Choose the correct answer from the options given below:
- (A) and (B) only
- (B) and (C) only
- (C) and (D) only
- (A) and (D) only
View Solution
6.
Polar species tend to have longer geographical ranges than tropical species in many taxonomic groups. This is generally known as:
- Hanski’s rule
- Rapoport’s rule
- Theory of island biogeography
- Allee effect
View Solution

7.
Match List I with List II:
LIST I - Ecological Parameters LIST II - Unit of Measurement
A. Net primary productivity I. g/m²
B. Absorbed photosynthetically active radiation II. g/L
C. Phosphorus III. Joules/area/year
D. Plant biomass IV. gC/area/year
Choose the correct answer from the options given below:

LIST I - Ecological Parameters	LIST II - Unit of Measurement
A. Net primary productivity	I. g/m²
B. Absorbed photosynthetically active radiation	II. g/L
C. Phosphorus	III. Joules/area/year
D. Plant biomass	IV. gC/area/year

(A) - (IV), (B) - (III), (C) - (II), (D) - (I)
(A) - (I), (B) - (II), (C) - (III), (D) - (IV)
(A) - (II), (B) - (III), (C) - (IV), (D) - (I)
(A) - (III), (B) - (IV), (C) - (I), (D) - (II)

View Solution

8.
It took 168 years for a population to increase from 0.4 million to 3.2 million. If we assume exponential growth at a constant rate over that period of time, the growth rate would be approximately:
- 1
- 1.25
- 1.5
- 1.75
View Solution
9.
Which of the following is responsible for peat formation in Bog System?
- Riccia
- Funaria
- Polytrichum
- Sphagnum
View Solution
10.
When alien species are introduced, some of them turn invasive and cause decline or extinction of indigenous species. When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct. Which of the following is most appropriate?
- Both (A) and (R) are correct and (R) is the correct explanation of (A)
- Both (A) and (R) are correct but (R) is not the correct explanation of (A)
- (A) is correct but (R) is not correct
- (A) is not correct but (R) is correct
View Solution
11.
Island communities are a special case in community dynamics in which species makeup is driven by interaction between:
A. Predator abundance
B. Disturbance
C. Colonization
D. Extinction
Choose the correct answer from the options given below:
- (A) and (B) only
- (B) and (C) only
- (C) and (D) only
- (A) and (D) only
View Solution
12.
Arrange the stages by which a species becomes invasive in an area:
A. Introduced
B. Established
C. Pest
D. Imported
Choose the correct answer from the options given below:
- (A), (B), (C), (D)
- (D), (B), (A), (C)
- (D), (A), (B), (C)
- (C), (B), (A), (D)
View Solution

13.
Match the decomposition processes with their functions:
List I List II
A. Leaching --- IV. Water soluble inorganic nutrients go down into the soil and get precipitated
B. Catabolism --- III. Bacterial and Fungal enzymes degrade detritus into simpler inorganic substances
C. Humification --- II. Accumulation of a colloidal dark coloured amorphous substance
D. Mineralization --- I. Degradation of humus by microbes to release inorganic nutrients IV. Water soluble inorganic nutrients go down into the soil and get precipitated
III. Bacterial and Fungal enzymes degrade detritus into simpler inorganic substances
II. Accumulation of a colloidal dark coloured amorphous substance
I. Degradation of humus by microbes to release inorganic nutrients

List I	List II
A. Leaching --- IV. Water soluble inorganic nutrients go down into the soil and get precipitated B. Catabolism --- III. Bacterial and Fungal enzymes degrade detritus into simpler inorganic substances C. Humification --- II. Accumulation of a colloidal dark coloured amorphous substance D. Mineralization --- I. Degradation of humus by microbes to release inorganic nutrients	IV. Water soluble inorganic nutrients go down into the soil and get precipitated III. Bacterial and Fungal enzymes degrade detritus into simpler inorganic substances II. Accumulation of a colloidal dark coloured amorphous substance I. Degradation of humus by microbes to release inorganic nutrients

A-IV, B-III, C-I, D-II
A-II, B-IV, C-I, D-III
A-II, B-III, C-IV, D-I
A-IV, B-III, C-II, D-I

View Solution

14.
Detritus food chain mainly consists of:
- Fungi and Bacteria
- Bryophytes
- Herbivores
- Algae
View Solution
15.
Arrange the following phases of successional development of a vegetation community in reverse order (last to first) as suggested by F.E. Clements:
Phases:
A. Phase of migration
B. Phase of nudation
C. Phase of ecesis
D. Phase of reaction
E. Phase of stabilization
Choose the correct answer from the options given below:
- (A), (B), (C), (D), (E)
- (E), (D), (C), (B), (A)
- (E), (D), (C), (A), (B)
- (E), (D), (A), (C), (B)
View Solution

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CUET PG PYQs for Ecology and Environment with Solutions: Practice CUET PG Previous Year Questions

CUET PG PYQs for Ecology and Environment with Solutions

1.
In most of terrestrial lakes, phosphorous is a limiting nutrient. Phosphorous is not an essential nutrient but present in high amounts compared to other nutrients. Which of the following is most appropriate?

3.
How can the ecological footprint of the entire human population be estimated?

5.
The main limiting factors for both plants and animals on a global scale are:
A. Fire
B. pH
C. Temperature
D. Moisture
Choose the correct answer from the options given below:

6.
Polar species tend to have longer geographical ranges than tropical species in many taxonomic groups. This is generally known as:

8.
It took 168 years for a population to increase from 0.4 million to 3.2 million. If we assume exponential growth at a constant rate over that period of time, the growth rate would be approximately:

9.
Which of the following is responsible for peat formation in Bog System?

10.
When alien species are introduced, some of them turn invasive and cause decline or extinction of indigenous species. When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct. Which of the following is most appropriate?

11.
Island communities are a special case in community dynamics in which species makeup is driven by interaction between:
A. Predator abundance
B. Disturbance
C. Colonization
D. Extinction
Choose the correct answer from the options given below:

12.
Arrange the stages by which a species becomes invasive in an area:
A. Introduced
B. Established
C. Pest
D. Imported
Choose the correct answer from the options given below:

14.
Detritus food chain mainly consists of:

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CUET PG PYQs for Ecology and Environment with Solutions

1.In most of terrestrial lakes, phosphorous is a limiting nutrient. Phosphorous is not an essential nutrient but present in high amounts compared to other nutrients. Which of the following is most appropriate?

3.How can the ecological footprint of the entire human population be estimated?

5.The main limiting factors for both plants and animals on a global scale are:A. FireB. pHC. TemperatureD. MoistureChoose the correct answer from the options given below:

6.Polar species tend to have longer geographical ranges than tropical species in many taxonomic groups. This is generally known as:

7.Match List I with List II:LIST I - Ecological ParametersLIST II - Unit of MeasurementA. Net primary productivityI. g/m2B. Absorbed photosynthetically active radiationII. g/LC. PhosphorusIII. Joules/area/yearD. Plant biomassIV. gC/area/yearChoose the correct answer from the options given below:

8.It took 168 years for a population to increase from 0.4 million to 3.2 million. If we assume exponential growth at a constant rate over that period of time, the growth rate would be approximately:

9.Which of the following is responsible for peat formation in Bog System?

10.When alien species are introduced, some of them turn invasive and cause decline or extinction of indigenous species. When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct. Which of the following is most appropriate?

11.Island communities are a special case in community dynamics in which species makeup is driven by interaction between:A. Predator abundanceB. DisturbanceC. ColonizationD. ExtinctionChoose the correct answer from the options given below:

12.Arrange the stages by which a species becomes invasive in an area:A. IntroducedB. EstablishedC. PestD. ImportedChoose the correct answer from the options given below:

14.Detritus food chain mainly consists of:

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1.
In most of terrestrial lakes, phosphorous is a limiting nutrient. Phosphorous is not an essential nutrient but present in high amounts compared to other nutrients. Which of the following is most appropriate?

3.
How can the ecological footprint of the entire human population be estimated?

5.
The main limiting factors for both plants and animals on a global scale are:
A. Fire
B. pH
C. Temperature
D. Moisture
Choose the correct answer from the options given below:

6.
Polar species tend to have longer geographical ranges than tropical species in many taxonomic groups. This is generally known as:

8.
It took 168 years for a population to increase from 0.4 million to 3.2 million. If we assume exponential growth at a constant rate over that period of time, the growth rate would be approximately:

9.
Which of the following is responsible for peat formation in Bog System?

10.
When alien species are introduced, some of them turn invasive and cause decline or extinction of indigenous species. When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct. Which of the following is most appropriate?

11.
Island communities are a special case in community dynamics in which species makeup is driven by interaction between:
A. Predator abundance
B. Disturbance
C. Colonization
D. Extinction
Choose the correct answer from the options given below:

12.
Arrange the stages by which a species becomes invasive in an area:
A. Introduced
B. Established
C. Pest
D. Imported
Choose the correct answer from the options given below:

14.
Detritus food chain mainly consists of: