Biology · The Living World · NEET
It is a way to name every plant and animal using exactly TWO words. The first word is the genus (a bigger group), and the second word is the species name (also called the specific epithet). For example, the scientific name of mango is Mangifera indica. 'Mangifera' is the genus and 'indica' is the species. This one name is used by scientists all over the world, so there is no confusion. This is why NEET calls it the binomial (two-name) system.
Carolus Linnaeus gave binomial nomenclature. This is a very common NEET trap. Whittaker did NOT give it — Whittaker gave the Five Kingdom classification (Monera, Protista, Fungi, Plantae, Animalia). So if a NEET question says 'Binomial nomenclature was given by R.H. Whittaker,' that statement is FALSE. Always remember: Linnaeus = two-word names; Whittaker = five kingdoms.
Two words are used so the name shows both the group and the exact organism. The first word (genus) tells you the larger group of related species. The second word (species/specific epithet) tells you the one exact organism inside that group. For example, Panthera leo is lion and Panthera tigris is tiger — same genus 'Panthera', but different species words. One word alone could not do this job. This is why the system needs two parts.
Nomenclature is the general idea of giving standard scientific names to organisms so everyone uses the same name. Binomial nomenclature is one specific SYSTEM of doing this — using two words (genus + species). So nomenclature is the goal, and binomial nomenclature (given by Linnaeus) is the method used to reach it. NEET may test this fine difference, so keep both meanings clear.
They are written in Latin, not in any local language. NCERT says biological names are 'generally in Latin and written in italics. They are Latinised or derived from Latin irrespective of their origin.' So even if a name comes from another language, it is turned into Latin form. A NEET 2016 question marked 'Biological names can be written in any language' as WRONG for exactly this reason.
The specific epithet is the SECOND word in the two-word name — it points to the exact species. In Mangifera indica, 'indica' is the specific epithet. It always starts with a small (lowercase) letter, while the genus (first word) starts with a capital letter. One genus can have many species, so it can have many specific epithets (like leo and tigris under Panthera).
Study the four statements (A–D) given below and select the two correct ones out of them: A. Definition of biological species was given by Ernst Mayr. B. Photoperiod does not affect reproduction in plants. C. Binomial nomenclature system was given by R.H. Whittaker. D. In unicellular organisms, reproduction is synonymous with growth. The two correct statements are:
Nomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature?
Try the real previous-year questions from this chapter — each with the answer and a full solution.
It is a naming system that gives each organism a scientific name of two words — the genus name first and the species name (specific epithet) second, written in Latin. Example: Mangifera indica (mango).
Carolus Linnaeus invented binomial nomenclature. He is often called the father of taxonomy for this two-word naming system.
Mangifera indica (mango), Solanum tuberosum (potato), Panthera leo (lion), and Homo sapiens (human being) are all examples. Each has one genus word and one species word.
'Bi' means two and 'nomial' comes from the Latin word for name. So binomial means 'two names' — the genus name and the species name together.
It is a high-frequency Living World topic. NEET repeatedly tests who gave it (Linnaeus, not Whittaker) and the rules of writing the two-word name, so a few marks are almost guaranteed if you learn it well.
