NEET Biology Ecosystem MCQs Set 13

Multiple Choice Questions (MCQs) for NEET Biology: Ecosystem

Access targeted multiple-choice questions for Ecosystem designed to align with the latest NEET academic syllabus for NEET Biology. These objective practice sets help students evaluate their conceptual understanding and improve exam readiness.

Practice Ecosystem MCQs for NEET Biology

Access the complete set of multiple-choice questions for Ecosystem below. This focused format allows students to isolate specific topics for thorough review and uninterrupted practice alongside official NEET textbooks.

Multiple Choice Questions

Question 1: Which of the following represents largest man made ecosystem?
(a) Zoo
(b) Garden
(c) Aquarium
(d) Agroecosystem
Show Answer & Explanation

Answer: (d) Agroecosystem

Explanation:
1. The correct option is (4) Agroecosystem.
2. Agroecosystem is a basic unit of study in agroecology, and is somewhat arbitrarity defined as a spatially and functionally coherent unit of agricultural activity.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Agroecosystem.

Question 2: To make the study of global ecosystem easier, it is broadly divided into how many basic categories?
(a) Three
(b) Two
(c) Four
(d) Five
Show Answer & Explanation

Answer: (b) Two

Explanation:
1. The correct option is (2) Two.
2. Two categories (i) Terrestrial ecosystem (ii) Aquatic ecosystem (Ecosystem - Components).

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Two.

Question 3: What percentages of PAR can be captured by plants?
(a) 1–5%
(b) 2–10%
(c) 20%
(d) 50%
Show Answer & Explanation

Answer: (b) 2–10%

Explanation:
1. The correct option is (2) 2–10%.
2. Plants capture only 2-10% of PAR or 1-5% of incident solar radiation in synthesis of organic matter. (Ecosystem - Function).

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: 2–10%.

Question 4: Rate of production of organic matter by producers per unit time and area is
(a) GPP
(b) NPP
(c) NPP – R
(d) More than one option is correct
Show Answer & Explanation

Answer: (a) GPP

Explanation:
1. The correct option is (1) GPP.
2. Rate of production of organic matter by producers per unit time and area is Gross Primary Productivity (GPP).

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: GPP.

Question 5: Magnitude of primary productivity is affected by
(a) Temperature, Availability of nutrients
(b) Solar radiations available, Availability of nutrients
(c) Photosynthetic capacity of producers
(d) All of these
Show Answer & Explanation

Answer: (d) All of these

Explanation:
1. The correct option is (4) All of these.
2. Magnitudes of primary productivity is affected by all these factors.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. Check every option separately before choosing a combined answer.

Question 6: Build up of organic material in soil is under which of the following conditions to
(a) < 10°C temperature, Absence of oxygen
(b) Warm temperature, Humid environment
(c) Aerobic conditions, > 25°C temperature
(d) Nitrogen rich detritus, Optimum moisture
Show Answer & Explanation

Answer: (a) < 10°C temperature, Absence of oxygen

Explanation:
1. The correct option is (1) < 10°C temperature, Absence of oxygen.
2. Build up of organic material in soil is under < 10°C temperature and absence of oxygen i.e. anaerobic condition.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: < 10°C temperature, Absence of oxygen.

Question 7: Trees → Birds → Lice → Bacteria. Thus food chain is
(a) Predatory
(b) Grazing
(c) Detritus
(d) Parasitic
Show Answer & Explanation

Answer: (d) Parasitic

Explanation:
1. The correct option is (4) Parasitic.
2. Trees → Birds → Lice → Bacteria represents parasitic food chain.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Parasitic.

Question 8: Choose odd one out w.r.t. functional aspects of ecosystem.
(a) Energy flow
(b) Decomposition
(c) Species composition
(d) Nutrient cycling
Show Answer & Explanation

Answer: (c) Species composition

Explanation:
1. The correct option is (3) Species composition.
2. Species composition is structural aspect of ecosystem.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Species composition.

Question 9: Major conduit of energy in land and aquatic ecosystem is transferred through ______ and ______ respectively.
(a) GFC, DFC
(b) PFC, GFC
(c) DFC, GFC
(d) GFC, GFC
Show Answer & Explanation

Answer: (c) DFC, GFC

Explanation:
1. The correct option is (3) DFC, GFC.
2. Major conduit of energy in land and aquatic ecosystem is transferred through detritus food chain and grazing food chain respectively.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: DFC, GFC.

Question 10: Which of the following organisms convert plant matter into animal matter?
(a) Earthworm
(b) Goat
(c) Termites
(d) Frog
Show Answer & Explanation

Answer: (b) Goat

Explanation:
1. The correct option is (2) Goat.
2. Goat (Herbivore).

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Goat.

Question 11: Productivity contributed by oceans is ______ but area covered is comparatively _______.
(a) High, less
(b) Low, more
(c) 10%, 71%
(d) 50%, 71%
Show Answer & Explanation

Answer: (b) Low, more

Explanation:
1. The correct option is (2) Low, more.
2. Productivity contributed by ocean is low but area covered is comparatively more.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Low, more.

Question 12: Mineralisation is performed by
(a) Small carnivores
(b) Detrivores
(c) Saprophytic bacteria and fungi
(d) Earthworm, termites
Show Answer & Explanation

Answer: (c) Saprophytic bacteria and fungi

Explanation:
1. The correct option is (3) Saprophytic bacteria and fungi.
2. Mineralisation is performed by saprophytic bacteria and fungi.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Saprophytic bacteria and fungi.

Question 13: Major site of decomposition in the soil and water bodies respectively is
(a) Bottom and upper layer
(b) Upper and bottom layer
(c) Upper and top layer
(d) Bottom and top layer
Show Answer & Explanation

Answer: (b) Upper and bottom layer

Explanation:
1. The correct option is (2) Upper and bottom layer.
2. Major site of decomposition in the soil and water bodies occur on upper and bottom layer respectively.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Upper and bottom layer.

Question 14: Raw material for decomposition represented by dead organic matter is
(a) Detritus
(b) Only roots
(c) Minerals
(d) Humus
Show Answer & Explanation

Answer: (a) Detritus

Explanation:
1. The correct option is (1) Detritus.
2. Raw material for decomposition represented by dead organic matter is detritus.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Detritus.

Question 15: Amount of inorganic substances present in an ecosystem is ______. Energy flow is a ______ feature of ecosystem.
(a) Standing crop, structural
(b) Standing state, functional
(c) Standing crop, functional
(d) Standing state, structural
Show Answer & Explanation

Answer: (b) Standing state, functional

Explanation:
1. The correct option is (2) Standing state, functional.
2. Standing state and functional.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Standing state, functional.

Question 16: Major utilisation of carbon from atmosphere is through
(a) Decomposition
(b) Photosynthesis
(c) Respiration
(d) Human activities
Show Answer & Explanation

Answer: (b) Photosynthesis

Explanation:
1. The correct option is (2) Photosynthesis.
2. Photosynthesis {Assimilation of CO2}. (Ecological Pyramids).

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Photosynthesis.

Question 17: Choose incorrect option w.r.t. amount of living material present in different trophic levels at a given time
(a) Can be measured as number
(b) Is equivalent to standing crop
(c) Is always represented as dry weight only
(d) Expressed both as biomass and number
Show Answer & Explanation

Answer: (c) Is always represented as dry weight only

Explanation:
1. The correct option is (3) Is always represented as dry weight only.
2. Trophic levels – Biomass, number, energy and standing crop.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Is always represented as dry weight only.

Question 18: The most common shape of pyramid of number is
(a) Inverted
(b) Urned
(c) Spindle
(d) Upright
Show Answer & Explanation

Answer: (d) Upright

Explanation:
1. The correct option is (4) Upright.
2. Pyramid of number is mostly upright.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Upright.

Question 19: Which of the following trophic levels are occupied by sparrow?
(a) Primary consumer, primary producer
(b) Secondary consumer, top carnivore
(c) Primary producer, secondary producer
(d) Primary consumer, secondary consumer
Show Answer & Explanation

Answer: (d) Primary consumer, secondary consumer

Explanation:
1. The correct option is (4) Primary consumer, secondary consumer.
2. Sparrow is herbivores feed on seeds so belongs as primary consumer and it also feeds on insects so secondary consumer.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Primary consumer, secondary consumer.

Question 20: Which of the following organisms were not given any place in ecological pyramids?
(a) Working at several trophic levels
(b) Decomposers
(c) Parasites
(d) More than one option is correct
Show Answer & Explanation

Answer: (d) More than one option is correct

Explanation:
1. The correct option is (4) More than one option is correct.
2. Both parasites and decomposers.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. Check every option separately before choosing a combined answer.

Question 21: Which of the following food chain shows spindle shaped pyramid of number?
(a) Grass → Insects → Frog
(b) Phytoplankton → Zooplankton → Small fish
(c) Tree → Birds → Hawks
(d) Tree → Birds → Insects → Bacteria
Show Answer & Explanation

Answer: (c) Tree → Birds → Hawks

Explanation:
1. The correct option is (3) Tree → Birds → Hawks.
2. Spindle shaped pyramid of number Tree → Birds → Hawks. (Ecological Succession).

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Tree → Birds → Hawks.

Question 22: In hydrarch succession, reed swamp stage is preceded by
(a) Forest community
(b) Scrub stage
(c) Sedge meadow stage
(d) Floating stage
Show Answer & Explanation

Answer: (d) Floating stage

Explanation:
1. The correct option is (4) Floating stage.
2. Sequences of Hydrosere Phytoplanktons → Submerged plants → Submerged free-floating → Reed swamp → Marsh medow → Scrub climax forest.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Floating stage.

Question 23: Ecological succession is ______ and ______ change in species composition.
(a) Orderly and sequential
(b) Unpredictable and orderly
(c) Gradual and unsequential
(d) Sequential and disorderly
Show Answer & Explanation

Answer: (a) Orderly and sequential

Explanation:
1. The correct option is (1) Orderly and sequential.
2. Ecological succession is orderly and sequential change in species composition.

Teacher's Note:
1. Link this question to the matching NCERT topic and revise it.
2. The point to remember: Orderly and sequential.

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Ecosystem Objective Questions & Solutions for NEET Biology

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FAQs

Where can I access latest NEET Biology Ecosystem MCQs Set 13?

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Are Assertion-Reasoning and Case-Study MCQs included in the Biology NEET material?

Yes, our NEET Biology Ecosystem MCQs Set 13 include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the NEET paper is now competency-based.

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By solving our NEET Biology Ecosystem MCQs Set 13, NEET students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Biology.

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Yes, Biology MCQs for NEET have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused NEET exams.

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