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NEET Biology: Taxonomy & Systematics Practice Questions

15 free multiple-choice questions on Taxonomy & Systematics (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 taxonomic unit is the smallest category above Kingdom in the taxonomic hierarchy?

    • AOrder
    • BClass
    • CFamily
    • DPhylum
    Show answer & explanation

    Correct answer: D — Phylum

    The standard hierarchical order in taxonomy is Kingdom > Phylum > Class > Order > Family > Genus > Species. Therefore, Phylum is the unit immediately above Kingdom.

  2. Q2. The broadest category in the taxonomic hierarchy is:

    • AClass
    • BPhylum
    • COrder
    • DKingdom
    Show answer & explanation

    Correct answer: D — Kingdom

    The broadest (highest) level in the taxonomic hierarchy is the Kingdom.

  3. Q3. The five-kingdom classification system was proposed by which scientist?

    • AWhittaker
    • BHaeckel
    • CAristotle
    • DLinnaeus
    Show answer & explanation

    Correct answer: A — Whittaker

    R.H. Whittaker proposed the five-kingdom classification system (Monera, Protista, Fungi, Plantae, Animalia) in 1969.

  4. Q4. Which of the following terms refers to the process of naming organisms according to a universally accepted system based on binomial nomenclature?

    • ANomenclature
    • BTaxonomy
    • CPhylogeny
    • DSystematics
    Show answer & explanation

    Correct answer: A — Nomenclature

    Nomenclature is the system of naming organisms, which includes the rules for naming them using the binomial system (Genus and species).

  5. Q5. The term 'Domain' is the highest level of classification used in the modern system of taxonomy. Which of the following represents the three domains of life?

    • AProtista, Bacteria, Archaea
    • BMonera, Protista, Fungi
    • CEukarya, Bacteria, Archaea
    • DAnimalia, Plantae, Fungi
    Show answer & explanation

    Correct answer: C — Eukarya, Bacteria, Archaea

    The three domains of life are Archaea, Bacteria, and Eukarya. This is the broadest level of classification in the modern system.

  6. Q6. Which of the following terms is used for the system of naming organisms based on genus and species?

    • ANomenclature
    • BSystematics
    • CTaxonomy
    • DBinomial Nomenclature
    Show answer & explanation

    Correct answer: D — Binomial Nomenclature

    Binomial Nomenclature is the formal system of naming organisms using two names: the genus name and the specific epithet (species name).

  7. Q7. Which principle is essential for creating a logical and stable classification system in biology?

    • AReliance solely on morphological features of one organism
    • BArbitrary naming
    • CGrouping based on phylogenetic relationships
    • DUsing only physical characteristics
    Show answer & explanation

    Correct answer: C — Grouping based on phylogenetic relationships

    A stable classification system is built upon the principle of grouping organisms based on their evolutionary history (phylogenetic relationships).

  8. Q8. Which of the following taxonomic categories is the broadest in scope?

    • AOrder
    • BKingdom
    • CClass
    • DPhylum
    Show answer & explanation

    Correct answer: B — Kingdom

    The Kingdom is the broadest taxonomic rank, encompassing all living organisms classified by their fundamental characteristics.

  9. Q9. Which of the following represents the correct taxonomic arrangement from broadest to narrowest?

    • AFamily, Class, Phylum, Kingdom
    • BSpecies, Genus, Family, Order
    • COrder, Family, Class, Phylum
    • DKingdom, Phylum, Class, Order
    Show answer & explanation

    Correct answer: D — Kingdom, Phylum, Class, Order

    The correct hierarchical order from broadest to narrowest is Kingdom, Phylum, Class, Order, Family, Genus, Species. Option B follows this sequence.

  10. Q10. The grouping of organisms based on their shared characteristics and evolutionary history is primarily defined by the concept of:

    • ABinomial Nomenclature
    • BTaxonomy
    • CNomenclature
    • DSystematics
    Show answer & explanation

    Correct answer: D — Systematics

    Systematics is the study of the evolutionary relationships among organisms, while Taxonomy is the process of naming and classifying organisms. Systematics is the broader concept encompassing evolutionary relationships.

  11. Q11. Taxonomy is essentially the science of:

    • AStudying the physical form of organisms
    • BClassifying and naming organisms
    • CStudying the ecological relationship
    • DNaming organisms
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    Correct answer: B — Classifying and naming organisms

    Taxonomy is the branch of biology concerned with the classification, naming, and grouping of organisms.

  12. Q12. Which taxonomic group contains organisms that are multicellular, eukaryotic, and heterotrophic?

    • AProtista
    • BPlantae
    • CFungi
    • DAnimalia
    Show answer & explanation

    Correct answer: D — Animalia

    The Kingdom Animalia is characterized by being multicellular, eukaryotic, and heterotrophic, encompassing all animals.

  13. Q13. In the binomial nomenclature system used for naming organisms, what are the two essential parts of a scientific name?

    • AClass and Phylum
    • BKingdom and Domain
    • CFamily and Order
    • DGenus and Species
    Show answer & explanation

    Correct answer: D — Genus and Species

    Binomial nomenclature requires two parts: the Genus (which names the group) and the species (which names the specific organism). The full scientific name is written in italics.

  14. Q14. In the system of binomial nomenclature, which part of the scientific name represents the genus?

    • ASpecies name
    • BGenus name
    • COrder name
    • DFamily name
    Show answer & explanation

    Correct answer: B — Genus name

    The scientific name is composed of two parts: the Genus name and the species name. The Genus name is always written first and is capitalized.

  15. Q15. What is the primary basis for the division of living organisms into different taxonomic groups?

    • AGeological history
    • BHabitat preference
    • CEcological factors
    • DShared evolutionary ancestry
    Show answer & explanation

    Correct answer: D — Shared evolutionary ancestry

    The division into taxonomic groups (systematics) is fundamentally based on the concept of shared evolutionary ancestry and similarities in traits.

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