Back to ECO SYSTEM
Your Progress
0 / 85 Answered
0
Correct
0
Incorrect
0%
Accuracy
NEET • BIOLOGY • ECO SYSTEM
Eco system practice · Easy
Choose an answer to check it, or open “View answer” to study the explanation. Sign in to save progress to your account.
Practice format and chapter quiz
The practice player uses single-correct-answer MCQs. Chapter quizzes help you review a topic; they are not full-length NEET mock papers.
Take a chapter quiz →
Showing 1-30 of 85 questions
Preparing practice and saved progress…
1
Easy
1 of 85
Remembering
+4 | -1
The reservoir for the gaseous type of biogeochemical cycle exists in
View answer and explanation
Correct option: B
Atmosphere
Option B (Atmosphere) is correct because the atmosphere serves as the primary reservoir for gaseous biogeochemical cycles.
2
Easy
2 of 85
Remembering
+4 | -1
Standing crop refers to
View answer and explanation
Correct option: C
The amount of living matter in a component population of an ecosystem at any time
Option C (The amount of living matter in a component population of an ecosystem at any time) is correct because standing crop refers to the biomass of a specific population at a given time.
3
Easy
3 of 85
Remembering
+4 | -1
Total energy fixed by an ecosystem is called
View answer and explanation
Correct option: B
Gross production
Option B (Gross production) is correct because the total energy fixed by an ecosystem is called gross production, which includes all energy captured by producers.
4
Easy
4 of 85
Understanding
+4 | -1
Primary productivity is affected by
I. temperature
II. sunlight
III. moisture
IV. availability of nutrients
I. temperature
II. sunlight
III. moisture
IV. availability of nutrients
View answer and explanation
Correct option: D
I, II, III and IV
Option D (I, II, III and IV) is correct because temperature, sunlight, moisture, and nutrient availability all significantly influence primary productivity.
5
Easy
5 of 85
Remembering
+4 | -1
In a pond ecosystem, benthos means
View answer and explanation
Correct option: A
Primary consumers in the depth of a pond
Option A is correct because benthos refers to the organisms living on or in the bottom sediment of a body of water, including primary consumers.
6
Easy
6 of 85
Analyzing
+4 | -1
Which type of ecological pyramid would be obtained with the following data -
Secondary Consumer - 2500 Joule
Primary Consumer - 4500 Joule
Primary Producer - 5000 Joule
Tertiary Consumer - 1000 Joule
Secondary Consumer - 2500 Joule
Primary Consumer - 4500 Joule
Primary Producer - 5000 Joule
Tertiary Consumer - 1000 Joule
View answer and explanation
Correct option: D
This pyramid is not possible.
Option D (This pyramid is not possible) is correct because energy must decrease at each higher trophic level, but here the primary consumer has less energy than the primary producer.
7
Easy
7 of 85
Understanding
+4 | -1
In which of the following, root system is poorly developed?
View answer and explanation
Correct option: B
Hydrilla
Option B (Hydrilla) is correct because Hydrilla is a submerged aquatic plant and has a poorly developed root system as it absorbs nutrients directly from the water.
8
Easy
8 of 85
Remembering
+4 | -1
The living organisms present in an ecosystem forms
View answer and explanation
Correct option: B
Biotic components
Option B is correct because living organisms in an ecosystem form the biotic components.
9
Easy
9 of 85
Understanding
+4 | -1
The enzymatic process by which degraded detritus is converted into simpler inorganic substances is called
View answer and explanation
Correct option: A
Catabolism
Option C (Mineralisation) is correct because mineralisation is the process by which decomposers convert organic matter into inorganic substances.
10
Easy
10 of 85
Remembering
+4 | -1
Ecosystem consists of
View answer and explanation
Correct option: D
All of these
Option D is correct because an ecosystem consists of producers, consumers, and decomposers, which are all essential for the flow of energy and nutrients.
11
Easy
11 of 85
Remembering
+4 | -1
Which ones are the reservoirs of sulphur and carbon cycles respectively?
View answer and explanation
Correct option: B
Earth crust and atmosphere
Option B (Earth crust and atmosphere) is correct because sulfur's main reservoir is the Earth's crust, and carbon's is the atmosphere (as CO2).
12
Easy
12 of 85
Understanding
+4 | -1
Energy stored at the consumer level is
View answer and explanation
Correct option: B
Secondary productivity
Option B (Secondary productivity) is correct because it refers to the rate of biomass production at the consumer level.
13
Easy
13 of 85
Understanding
+4 | -1
Lion is kept under in Eltonian pyramid as
View answer and explanation
Correct option: D
Tertiary consumer
Option D (Tertiary consumer) is correct because lions typically feed on secondary consumers, placing them at the tertiary level.
14
Easy
14 of 85
Understanding
+4 | -1
How many statements are correct w.r.t. ecological succession?
a. Climax community is most stable shows more niche specialisation.
b. Lichen and fungi are examples of climax communities
c. Hydarch succession leads to mesic condition.
d. Xerarch succession leads to very wet condition.
a. Climax community is most stable shows more niche specialisation.
b. Lichen and fungi are examples of climax communities
c. Hydarch succession leads to mesic condition.
d. Xerarch succession leads to very wet condition.
View answer and explanation
Correct option: C
Two
Option C (Two) is correct because statements a and c are correct, while b and d are incorrect.
15
Easy
15 of 85
Understanding
+4 | -1
These belong to the category of primary consumers.
View answer and explanation
Correct option: D
Insects and cattle
Option D (Insects and cattle) is correct because both insects and cattle primarily consume producers (plants), classifying them as primary consumers.
Explore Other Chapters in BIOLOGY
View All →
16
Easy
16 of 85
Remembering
+4 | -1
The pymarid which is always upright is
View answer and explanation
Correct option: D
pyramid of energy
Option D (pyramid of energy) is always upright. Energy flow is unidirectional, and energy decreases at each successive trophic level.
17
Easy
17 of 85
Remembering
+4 | -1
In ecological succession the communities in near equilibrium with the environment, are called
View answer and explanation
Correct option: A
Climax communities
Option A is correct because climax communities are the final, stable communities in ecological succession, in near equilibrium with the environment.
18
Easy
18 of 85
Analyzing
+4 | -1
Assertion: Primary productivity is shown by green plants only.
Reason: Primary productivity is also shown by chemosynthesizers.
Reason: Primary productivity is also shown by chemosynthesizers.
View answer and explanation
Correct option: B
If both assertion and reason are true but reason is not the correct explanation of assertion
Option B is correct because both green plants and chemosynthesizers can perform primary productivity, but the reason doesn't explain why the assertion is true.
19
Easy
19 of 85
Remembering
+4 | -1
Maximum primary productivity of pond is achieved by
View answer and explanation
Correct option: A
Phytoplankton
Option A (Phytoplankton) is correct because phytoplankton are the primary producers in ponds and contribute the most to primary productivity.
20
Easy
20 of 85
Remembering
+4 | -1
Organisms that breakdown the detritus into matter particles are
View answer and explanation
Correct option: C
Detritivores
Option C (Detritivores) is correct because detritivores are organisms that feed on detritus, breaking it down into smaller particles.
21
Easy
21 of 85
Understanding
+4 | -1
The detritus food chain
View answer and explanation
Correct option: A
Begins with dead organic matter
The correct answer is A (Begins with dead organic matter) because the detritus food chain starts with detritus, which is dead organic material.
22
Easy
22 of 85
Understanding
+4 | -1
Which of the following pair is a gaseous type of biogeochemical cycle?
View answer and explanation
Correct option: A
Nitrogen and carbon cycle
Option A (Nitrogen and carbon cycle) is correct because both nitrogen and carbon cycles have significant gaseous components, with major reservoirs in the atmosphere.
23
Easy
23 of 85
Understanding
+4 | -1
Greater primary productivity depends upon
View answer and explanation
Correct option: C
Both (a) and (b)
Option C (Both (a) and (b)) is correct because both rain (humidity) and the availability of nutrients are crucial for greater primary productivity.
24
Easy
24 of 85
Understanding
+4 | -1
The pyramid of number of a parasitic food chain in tree ecosystem is
View answer and explanation
Correct option: A
Always inverted
Option A (Always inverted) is correct because in a parasitic food chain on a tree, one tree supports many herbivores, and each herbivore supports many parasites, resulting in an inverted pyramid of numbers.
25
Easy
25 of 85
Remembering
+4 | -1
Humus is
View answer and explanation
Correct option: D
Red coloured substances rich in iron
Option A (Dark coloured amorphous organic matter rich in lignin) is the closest to correct, but the question is flawed. Humus is dark-colored, amorphous organic matter rich in lignin, cellulose, and other complex organic compounds.
26
Easy
26 of 85
Understanding
+4 | -1
…… temperature is required for the proper functioning of an enzyme. The most appropriate word
View answer and explanation
Correct option: C
Optimum
Option C (Optimum) is correct because enzymes function best at their optimum temperature.
27
Easy
27 of 85
Remembering
+4 | -1
The rate of biomass production per unit area over a time period by plants during photosynthesis is called
View answer and explanation
Correct option: A
Gross primary productivity
Option A (Gross primary productivity) is correct because it refers to the total rate of biomass production by plants during photosynthesis.
28
Easy
28 of 85
Remembering
+4 | -1
When the number of organisms at successive levels are plotted they assume the shape of a pyramid. This is called the pyramid of
View answer and explanation
Correct option: B
Number
Option B (Number) is correct because when the number of organisms at successive trophic levels are plotted, they often form a pyramid shape, known as the pyramid of number.
29
Easy
29 of 85
Understanding
+4 | -1
Some of the nutrient cycles are labelled as below
I. Sulphur cycle II. Phosphorus cycle
III. Carbon cycle IV .Nitrogen cycle
Of these, the sedimentary cycle is represented by
I. Sulphur cycle II. Phosphorus cycle
III. Carbon cycle IV .Nitrogen cycle
Of these, the sedimentary cycle is represented by
View answer and explanation
Correct option: D
I and II
Option D (I and II) is correct because both the sulphur and phosphorus cycles are primarily sedimentary, with their reservoirs in rocks and soil.
30
Easy
30 of 85
Remembering
+4 | -1
Which one of the following is a gaseous cycle?
View answer and explanation
Correct option: A
Sulphur cycle
Option C (Nitrogen cycle) is correct because the nitrogen cycle primarily involves the movement of nitrogen gas through the atmosphere, soil, and living organisms.
Revision notes and key takeaways
Review ECO SYSTEM in your textbook or class notes, then use this set to check your understanding.
Key Takeaways
- ✓ This set contains 85 single-correct-answer MCQs on ECO SYSTEM.
- ✓ Try each question before opening its answer. Read the explanation where one is available.
- ✓ Sign in to save submitted answers. Revisit incorrect answers alongside your textbook or class notes.
Showing 1-30 of 85 questions