NEET PYQs for Organisms and Their Environments with Solutions: Practice NEET Previous Year Questions

Updated on - Jan 19, 2026

Organisms and Their Environments is an important topic in the Biology section in NEET exam. Practising this topic will increase your score overall and make your conceptual grip on NEET exam stronger.

This article gives you a full set of NEET PYQs for Organisms and Their Environments with explanations for effective preparation. Practice of NEET Biology PYQs including Organisms and Their Environments questions regularly will improve accuracy, speed, and confidence in the NEET 2026 exam.

NEET PYQs for Organisms and Their Environments with Solutions

1.
Soil conservation is
- conversion of sterile soil into fertile one
- aeration of soil
- erosion of soil
- protection against loss.
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2.
Niche overlap indicates -
- Mutualism between two species
- Active cooperation between two species
- Two different parasites on the same host
- Sharing of one or more resources between the two species
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3.
The 'niche' of a species is meant for
- habitat and specific functions of a species
- specific place where an organism lives
- specific species function and its competitive power
- none of these.
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4.
According to oparin, which one of the following was not present in the primitive atmosphere of the earth
- Oxygen
- Hydrogen
- Water vapour
- Methane
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5.
Which of the following organisms are known as chief producers in the oceans ?
- Dinoflagellates
- Cyanobacteria
- Diatoms
- Euglenoids
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6.
In relation to Gross primary productivity and Net primary productivity of an ecosystem, which one of the following statements is correct?
- Gross primary productivity is always less than net primary productivity.
- Gross primary productivity is always more than net primary productivity.
- Gross primary productivity and Net primary productivity are one and same.
- There is no relationship between Gross primary productivity and Net primary productivity.
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7.
Soil particles determine its
- texture
- field capacity
- water holding capacity
- soil flora.
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