Part 4 – Binomial Nomenclature & Classification (25 MCQs)

Q1. Who introduced the system of binomial nomenclature?

A. Aristotle
B. Darwin
C. Carolus Linnaeus
D. Whittaker

Answer: C. Carolus Linnaeus

A. Aristotle → Incorrect, classified animals but no binomial system.
B. Darwin → Incorrect, proposed evolution theory.
C. Linnaeus → Correct, father of taxonomy, introduced binomial system.
D. Whittaker → Incorrect, gave five-kingdom classification.

Q2. In binomial nomenclature, the first word represents:

A. Species
B. Genus
C. Family
D. Order

Answer: B. Genus

A. Species → Incorrect, second word.
B. Genus → Correct, always capitalized.
C. Family → Incorrect, higher category.
D. Order → Incorrect.

**Q3. In the name Homo sapiens, “sapiens” refers to:**

A. Family
B. Genus
C. Species epithet
D. Class

Answer: C. Species epithet

A. Family → Incorrect, Hominidae is family.
B. Genus → Incorrect, Homo is genus.
C. Species epithet → Correct, “sapiens” is species epithet.
D. Class → Incorrect, Mammalia is class.

Q4. The scientific name of mango is:

A. Mangifera Indica
B. Mangifera indica
C. mangifera Indica
D. Mangifera Indica L.

Answer: B. Mangifera indica

A. Incorrect → Species epithet should be lowercase.
B. Correct → Genus capitalized, species lowercase.
C. Incorrect → Genus must be capitalized.
D. Incorrect → “L.” (for Linnaeus) optional, not basic form.

Q5. The correct way of writing scientific names is:

A. Underlined or italicized
B. Written in local language
C. Written in English only
D. Written in uppercase

Answer: A. Underlined or italicized

A. Correct → Scientific names are italicized (printed) or underlined (handwritten).
B. Incorrect → Local names vary regionally.
C. Incorrect → Latin or Latinized form is used, not English.
D. Incorrect → Not in all caps.

Q6. Which of the following rules of binomial nomenclature is correct?

A. Genus and species both capitalized
B. Genus name begins with capital letter
C. Species epithet is capitalized
D. Names written in any language

Answer: B. Genus name begins with capital letter

A. Incorrect → Only genus is capitalized.
B. Correct → First letter of genus capitalized.
C. Incorrect → Species epithet always lowercase.
D. Incorrect → Must be Latin/Latinized.

Q7. Which one of the following is NOT a binomial name?

A. Rosa indica
B. Solanum tuberosum
C. Felis catus
D. Cat

Answer: D. Cat

A. Correct → Scientific name of rose.
B. Correct → Scientific name of potato.
C. Correct → Scientific name of domestic cat.
D. Correct answer → Common name, not binomial.

Q8. The authority name in scientific naming refers to:

A. The scientist who discovered the organism
B. The scientist who described/named it
C. The government authority
D. The taxonomist’s institution

Answer: B. The scientist who described/named it

A. Incorrect → Discoverer may not be namer.
B. Correct → Authority name indicates who published/validly named it.
C. Incorrect.
D. Incorrect.

Q9. Which is the correct trinomial nomenclature for modern humans?

A. Homo sapiens sapiens
B. Homo sapiens
C. Homo erectus sapiens
D. Homo habilis sapiens

Answer: A. Homo sapiens sapiens

A. Correct → Subspecies of Homo sapiens.
B. Incorrect → Binomial only.
C. Incorrect → Not valid nomenclature.
D. Incorrect → Not accepted.

Q10. Who is regarded as the Father of Modern Classification?

A. Darwin
B. Linnaeus
C. Whittaker
D. Aristotle

Answer: B. Linnaeus

A. Darwin → Incorrect, evolution.
B. Linnaeus → Correct, Systema Naturae.
C. Whittaker → Incorrect, five-kingdom system.
D. Aristotle → Incorrect, earlier natural classification.

Q11. Which of the following is a correct pair of genus and species?

A. Canis domesticus
B. Panthera leo
C. Solanum Mangifera
D. Pisum Oryza

Answer: B. Panthera leo

A. Incorrect → Dog’s correct name is Canis familiaris.
B. Correct → Scientific name of lion.
C. Incorrect → Wrong genus-species combination.
D. Incorrect → Two genera, invalid.

Q12. The advantage of binomial nomenclature is that:

A. It changes frequently
B. It is universal
C. It uses local languages
D. It is confusing

Answer: B. It is universal

A. Incorrect → Names are stable, not frequently changed.
B. Correct → Same name recognized worldwide.
C. Incorrect → Not in local languages.
D. Incorrect → Brings clarity, not confusion.

Q13. Which of the following classification systems divided organisms into two groups: Plantae and Animalia?

A. Whittaker’s
B. Linnaeus’
C. Aristotle’s
D. Haeckel’s

Answer: B. Linnaeus’

A. Incorrect → Five kingdoms.
B. Correct → Two-kingdom system.
C. Incorrect → Classified as blooded/bloodless.
D. Incorrect → Three kingdoms.

Q14. Which is an example of correct scientific naming according to binomial nomenclature?

A. Escherichia Coli
B. Escherichia coli
C. escherichia coli
D. ESCHERICHIA COLI

Answer: B. Escherichia coli

A. Incorrect → Species epithet incorrectly capitalized.
B. Correct → Genus capitalized, species lowercase.
C. Incorrect → Genus lowercase.
D. Incorrect → All caps.

Q15. The naming of organisms is regulated by:

A. ICZN and ICBN
B. WHO and FAO
C. UNEP and UNDP
D. ICMR and ICAR

Answer: A. ICZN and ICBN

A. Correct → Zoology (ICZN), Botany (ICBN).
B. Incorrect → International organizations.
C. Incorrect → Not nomenclature authorities.
D. Incorrect.

Q16. Which classification system used morphology and reproductive organs as criteria?

A. Natural system
B. Artificial system
C. Phylogenetic system
D. Molecular system

Answer: A. Natural system

A. Correct → Based on morphology and natural affinities.
B. Incorrect → Based on few superficial characters.
C. Incorrect → Based on evolutionary history.
D. Incorrect → Based on molecular data.

Q17. Which scientist gave the three-kingdom system of classification?

A. Linnaeus
B. Whittaker
C. Haeckel
D. Darwin

Answer: C. Haeckel

A. Linnaeus → Incorrect, two-kingdom.
B. Whittaker → Incorrect, five-kingdom.
C. Haeckel → Correct, proposed Protista as third kingdom.
D. Darwin → Incorrect.

Q18. The natural system of classification was given by:

A. Bentham and Hooker
B. Linnaeus
C. Aristotle
D. Darwin

Answer: A. Bentham and Hooker

A. Correct → Natural system of classification.
B. Incorrect → Two-kingdom system.
C. Incorrect → Earliest system.
D. Incorrect.

Q19. Which of the following is an artificial system of classification?

A. Bentham & Hooker’s system
B. Linnaeus’ sexual system
C. Phylogenetic system
D. Natural system

Answer: B. Linnaeus’ sexual system

A. Incorrect → Natural system.
B. Correct → Based only on reproductive organs.
C. Incorrect → Based on evolutionary history.
D. Incorrect.

Q20. Which system of classification is based on evolutionary relationships?

A. Artificial
B. Natural
C. Phylogenetic
D. Sexual

Answer: C. Phylogenetic

A. Incorrect → Based on few traits.
B. Incorrect → Based on morphology.
C. Correct → Based on phylogeny.
D. Incorrect.

Q21. Which of the following is true about binomial nomenclature?

A. Same organism may have different names worldwide.
B. It helps in universal identification.
C. It uses local names.
D. It uses numbers instead of words.

Answer: B. It helps in universal identification

A. Incorrect → Common names vary, not scientific names.
B. Correct → Binomial names are universal.
C. Incorrect → Not local names.
D. Incorrect.

Q22. The two components of binomial nomenclature are:

A. Order and Class
B. Genus and Species
C. Family and Genus
D. Species and Family

Answer: B. Genus and Species

A. Incorrect.
B. Correct → Binomial = Genus + species epithet.
C. Incorrect.
D. Incorrect.

Q23. Who classified plants into trees, shrubs, and herbs?

A. Darwin
B. Linnaeus
C. Aristotle
D. Theophrastus

Answer: D. Theophrastus

A. Incorrect.
B. Incorrect.
C. Incorrect.
D. Correct → Father of Botany, classified plants.

Q24. Which classification system is considered most scientific?

A. Artificial
B. Natural
C. Phylogenetic
D. Sexual

Answer: C. Phylogenetic

A. Incorrect → Based on superficial traits.
B. Incorrect → Improved but not best.
C. Correct → Based on evolutionary history.
D. Incorrect.

Q25. The binomial name of housefly is:

A. Musca domestica
B. Drosophila melanogaster
C. Apis indica
D. Felis catus

Answer: A. Musca domestica

A. Correct → Housefly.
B. Incorrect → Fruit fly.
C. Incorrect → Indian honey bee.
D. Incorrect → Domestic cat.

✅ Part 4 Completed – 25 MCQs
This section covered binomial nomenclature rules, examples, classification systems (artificial, natural, phylogenetic), and scientists’ contributions.

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Part 4 – Binomial Nomenclature & Classification (25 MCQs)