Home Subjects NEET Zoology Ecology & Environment

NEET Zoology
Ecology & Environment

Zoology questions for NEET UG — Animal Kingdom, Human Physiology, Genetics, Evolution.

100 Q 6 Topics Take Test
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Difficulty: All Easy Medium Hard 81–90 of 100
Topics in NEET Zoology
Which of the following best explains biological magnification?
A Increase in organism size over generations
B Accumulation of toxic substances in higher concentrations at higher trophic levels
C Rapid increase in population numbers
D Expansion of species range
Correct Answer:  B. Accumulation of toxic substances in higher concentrations at higher trophic levels
EXPLANATION

Biomagnification is the process where persistent pollutants like DDT accumulate in higher concentrations as you move up the food chain.

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India's first National Park, established in 1936, is:
A Kanha National Park
B Jim Corbett National Park
C Kaziranga National Park
D Gir National Park
Correct Answer:  B. Jim Corbett National Park
EXPLANATION

Jim Corbett National Park (originally Hailey National Park) in Uttarakhand was India's first national park, established to protect tigers.

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The phenomenon where a species' role varies in different environmental contexts is called:
A Niche breadth
B Ecological niche
C Functional role
D Ecological release
Correct Answer:  D. Ecological release
EXPLANATION

Ecological release occurs when a species expands its habitat use and resource utilization when competing species are absent.

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Which of the following is an example of mutualistic relationship?
A Mosquito and human
B Nitrogen-fixing bacteria and legume plants
C Lion and deer
D Tapeworm and human
Correct Answer:  B. Nitrogen-fixing bacteria and legume plants
EXPLANATION

Mutualism benefits both organisms. Nitrogen-fixing bacteria receive carbohydrates from legumes while providing usable nitrogen.

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The Gause's law of competitive exclusion states that:
A Two species can coexist indefinitely with identical niches
B Two species with identical niches cannot coexist indefinitely
C Competition always leads to extinction
D All species must have identical resource requirements
Correct Answer:  B. Two species with identical niches cannot coexist indefinitely
EXPLANATION

This law states that two species competing for identical resources in the same habitat cannot coexist; one will be outcompeted.

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What is ecological succession preceded by the death of existing community called?
A Primary succession
B Secondary succession
C Tertiary succession
D Climax succession
Correct Answer:  B. Secondary succession
EXPLANATION

Secondary succession occurs after disturbance to an existing ecosystem where soil remains intact, allowing faster recovery.

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Which biogeographical region of India is known for the highest biodiversity?
A Thar Desert
B Western Ghats
C Deccan Plateau
D Indo-Gangetic Plain
Correct Answer:  B. Western Ghats
EXPLANATION

The Western Ghats is one of the world's 34 biodiversity hotspots with over 7,400 species of plants, many endemic to the region.

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The term 'biodiversity hotspot' refers to regions with:
A High human population density
B High temperature
C Exceptionally high species richness and endemism
D Low rainfall
Correct Answer:  C. Exceptionally high species richness and endemism
EXPLANATION

Biodiversity hotspots are regions with high concentration of endemic species and exceptional species diversity, like Western Ghats in India.

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Which of the following is NOT a renewable resource?
A Solar energy
B Wind energy
C Coal
D Geothermal energy
Correct Answer:  C. Coal
EXPLANATION

Coal is a non-renewable fossil fuel formed over millions of years. Solar, wind, and geothermal are renewable resources.

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What is the main cause of ozone layer depletion?
A Increased CO₂ emissions
B Chlorofluorocarbons (CFCs)
C Methane release
D Nitrogen oxides
Correct Answer:  B. Chlorofluorocarbons (CFCs)
EXPLANATION

CFCs from refrigerants and aerosols release chlorine atoms that catalytically destroy ozone molecules in the stratosphere.

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