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NEET Biology: Biodiversity Practice Questions

15 free multiple-choice questions on Biodiversity (Diversity in Living World) for NEET Biology, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.

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  1. Q1. Which of the following terms refers to the variety of life existing in a particular habitat or region?

    • ATaxonomic diversity
    • BGenetic diversity
    • CEcosystem diversity
    • DSpecies diversity
    Show answer & explanation

    Correct answer: D — Species diversity

    Species diversity refers to the variety of different species present in a particular area, which is a core component of biodiversity.

  2. Q2. Which of the following represents the broadest category in the taxonomic hierarchy?

    • APhylum
    • BKingdom
    • CClass
    • DOrder
    Show answer & explanation

    Correct answer: B — Kingdom

    The Kingdom is the highest and broadest taxonomic category among the major ranks (Kingdom, Phylum, Class, Order, Family, Genus, Species).

  3. Q3. The study of the variety of organisms and their interactions with each other and their environment is known as:

    • ASystematics
    • BEvolution
    • CTaxonomy
    • DEcology
    Show answer & explanation

    Correct answer: D — Ecology

    Ecology is the branch of biology that deals with the relations between living organisms and their physical environment.

  4. Q4. The variety of different species found in a particular area is classified under which level of biodiversity?

    • AGenetic diversity
    • BTaxonomic diversity
    • CSpecies diversity
    • DPhysiological diversity
    Show answer & explanation

    Correct answer: C — Species diversity

    Species diversity refers to the variety of different species present in a particular area.

  5. Q5. Which of the following levels is considered the fundamental basis for the existence of biodiversity?

    • AEcosystem diversity
    • BSpecies diversity
    • CGenetic diversity
    • DPopulation diversity
    Show answer & explanation

    Correct answer: C — Genetic diversity

    Genetic diversity (variation in genes within a species) is the fundamental basis from which all other forms of biodiversity (species, populations, and ecosystems) arise and are maintained.

  6. Q6. Which of the following is generally considered the most diverse level of biodiversity?

    • APopulation diversity
    • BSpecies diversity
    • CHabitat diversity
    • DGenetic diversity
    Show answer & explanation

    Correct answer: B — Species diversity

    Species diversity (the number of different species) is generally considered the most commonly measured and varied level of biodiversity.

  7. Q7. Biodiversity is considered essential for the stability of the planet primarily because:

    • AIt ensures uniform climate conditions.
    • BIt limits the rate of evolution.
    • CIt reduces the total biomass of organisms.
    • DIt provides essential ecosystem services.
    Show answer & explanation

    Correct answer: D — It provides essential ecosystem services.

    Ecosystem services (like pollination, climate regulation, and nutrient cycling) provided by diverse ecosystems are crucial for human survival and planetary stability.

  8. Q8. Which of the following levels of biological organization is the most fundamental unit of biodiversity?

    • APopulation
    • BEcosystem
    • CSpecies
    • DGenus
    Show answer & explanation

    Correct answer: C — Species

    Biodiversity is studied at multiple levels. The variety of life at the species level is considered the most fundamental unit for studying ecological diversity and evolution.

  9. Q9. Endemism is the state where a species is found exclusively in a particular geographic region. This relates primarily to which type of biodiversity?

    • AFunctional diversity
    • BPhenotypic diversity
    • CSpecies diversity
    • DGenetic diversity
    Show answer & explanation

    Correct answer: C — Species diversity

    Endemism describes the unique distribution of a species, directly relating to the variety of species found in a region (species diversity).

  10. Q10. Which type of biodiversity deals with the variety of different organisms living in a particular area?

    • ATaxonomic diversity
    • BSpecies diversity
    • CGenetic diversity
    • DEcological diversity
    Show answer & explanation

    Correct answer: B — Species diversity

    Species diversity deals with the variety of different species present in a particular region.

  11. Q11. A high degree of species evenness in an ecosystem indicates that:

    • AThe ecosystem has very high genetic diversity.
    • BThe ecosystem is dominated by one species.
    • CAll species have nearly equal abundance.
    • DThe ecosystem has very few species.
    Show answer & explanation

    Correct answer: C — All species have nearly equal abundance.

    Species evenness refers to the relative abundance of different species; high evenness means that most species have similar populations.

  12. Q12. The concept of biodiversity primarily includes the variation found at which three main levels?

    • AOrganism, Population, and Community
    • BHabitat, Climate, and Biotic factors
    • CGene, Species, and Ecosystem
    • DFood web, Producers, and Consumers
    Show answer & explanation

    Correct answer: C — Gene, Species, and Ecosystem

    Biodiversity encompasses variation at the genetic level, species level, and ecosystem level.

  13. Q13. Which term refers to the variety of life found in a particular area?

    • ABiotic factors
    • BEcosystem
    • CBiodiversity
    • DHabitat
    Show answer & explanation

    Correct answer: C — Biodiversity

    Biodiversity refers to the variety of life found in a specific region or on Earth, encompassing genetic, species, and ecosystem diversity.

  14. Q14. In the taxonomic hierarchy, which level is above 'Family'?

    • AOrder
    • BGenus
    • CPhylum
    • DClass
    Show answer & explanation

    Correct answer: A — Order

    The standard hierarchy is Kingdom > Phylum > Class > Order > Family > Genus > Species. Order is the level immediately above Family.

  15. Q15. The loss of biodiversity is primarily a concern because it affects the stability and resilience of which system?

    • ALithosphere system
    • BBiosphere system
    • CHydrosphere system
    • DAtmospheric system
    Show answer & explanation

    Correct answer: B — Biosphere system

    Biodiversity loss directly impacts the stability and resilience of the entire biosphere, which includes all living organisms and their interactions.

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