Q.What does ICZN stand for?
🔒You're viewing a preview — the full solution, concept, methods & PYQ mapping are locked.
🔒 Start your 14-day free trial to unlock the full solution →Concept understanding — Binomial Nomenclature
Imagine trying to talk about one particular plant with someone in another country when each of you knows it only by a different local name — names that change from place to place even within a single country. The conversation quickly becomes confused, because the same organism is being called many different things. Binomial nomenclature is the elegant solution to exactly this problem: it gives every organism one standard scientific name that means the same thing everywhere in the world.
Binomial nomenclature is a system in which every scientific name is made of two parts — the generic name (the genus) and the specific epithet (the species). This two-word system was devised by Carolus Linnaeus and is used by biologists everywhere because it is so convenient. For example, the scientific name of the mango is written as Mangifera indica, where Mangifera is the genus and indica is the specific epithet.
The naming follows a set of universally agreed rules:
- Biological names are generally in Latin and written in italics; whatever their original language, they are treated as Latinised.
- The first word denotes the genus; the second word denotes the specific epithet.
- When handwritten, the two words are underlined separately; in print they appear in italics, showing their Latin origin.
- The genus name begins with a capital letter, while the specific epithet begins with a small letter — as in Mangifera indica.
- The author's name, in abbreviated form, is added at the very end, for instance Mangifera indica Linn., indicating that Linnaeus was the first to describe the species. …
ICZN stands for the International Code of Zoological Nomenclature.
- It is the set of agreed rules that biologists worldwide follow when assigning scientific names to animals.
- Its counterpart for plants is the International Code for Botanical Nomenclature (ICBN). …
ICZN is short for the International Code of Zoological Nomenclature, the standardised naming system for animals.
Because the same animal can carry many different local names depending on region and language, biologists needed one agreed system so that a given organism is referred to by exactly the same name everywhere in the world. That system, for animals, is the International Code of Zoological Nomenclature.
- The code lays out the rules that make an animal's scientific name consistent and unambiguous, complementing the identification work that establishes exactly which organism a name refers to.
- Its counterpart for the plant kingdom is the International Code for Botanical Nomenclature, so together the two codes cover naming across both major kingdoms. …
- AP EAPCET 2024Set ap-2024-05-17-FN1 markMCQQ.The technical presentation of Mango should be as follows I. Abbreviated form of author name after the specific epithet II. Both the words should be printed in italics III. The first word must represent genus IV. Name should not be underlined when hand written (A) II, III, IV (B) I, II (C) I, II, III (D) I, III, IV
›Reveal solutionSolution
This tests the standard rules of binomial nomenclature as applied to the scientific name of mango, including the correct handwriting convention.
Concept and Intuition
Binomial nomenclature gives every species a two-word Latin name: genus (capitalized) + specific epithet (lowercase), followed by the abbreviated name of the describing authority. In print these are italicized; when handwritten or typed without italics, the convention is to underline them instead — not leave them plain.
Step-by-Step Solution
- Statement I: an abbreviated author's name is written after the specific epithet, e.g. "Mangifera indica Linn." — true, standard convention.
- Statement II: both the genus and specific epithet are printed in italics — true, standard convention for typeset names.
- Statement III: the first word, Mangifera, represents the genus — true, by the very definition of a binomial name (genus + species). …
- AP EAPCET 2023Set ap-2023-05-23-FN1 markMCQQ.Match the following List I: A. Red panda B. Siberian crane C. The black buck D. Pygmy hog List II: i. Grus leucogeranus ii. Antelope cervicapra iii. Sus salvanius iv. Ailurus ochraceus (A) A. iv B. i C. ii D. iii (B) A. iii B. iv C. i D. ii (C) A. ii B. i C. iv D. iii (D) A. iii B. iv C. ii D. i
›Reveal solutionSolution
Straightforward recall of endangered Indian species and their binomial names.
Concept and Intuition
This tests memorised species-to-scientific-name pairs commonly cited among India's endangered/rare fauna in biodiversity conservation chapters.
Step-by-Step Solution
- Red panda → genus Ailurus (listed here as iv).
- Siberian crane → Grus leucogeranus (i).
- Blackbuck → Antelope cervicapra (ii).
- Pygmy hog → Sus salvanius (iii). …
- AP EAPCET 2022Set ap-2022-07-12-FN1 markMCQQ.The Scientific name of Rhesus monkey (A) Macaca fascicularis (B) Macaca radiata (C) Macaca mulatta (D) Macaca fuscata
›Reveal solutionSolution
The Rhesus monkey's scientific name is Macaca mulatta.
Concept and Intuition
Several species within the genus Macaca are commonly confused because they share the same genus name; distinguishing the correct species epithet for the Rhesus monkey specifically is the point of this question. The Rhesus monkey is historically significant as the species in which the Rh blood group antigen was first identified.
Step-by-Step Solution
- Recall the genus Macaca includes multiple species: Macaca mulatta (Rhesus monkey), Macaca fascicularis (crab-eating/long-tailed macaque), Macaca radiata (bonnet macaque), Macaca fuscata (Japanese macaque).
- The Rhesus monkey specifically corresponds to Macaca mulatta. …
- AP EAPCET 2021Set ap-2021-10-05-FN1 markMCQQ.Who introduced Binomial Nomenclature for the first time? (A) Gaspard Bauhin (1623) (B) Carolus Von Linnaeus (18th century) (C) Stephen Hales (D) Nehemiah Grew
›Reveal solutionSolution
Binomial nomenclature was first introduced by Gaspard Bauhin in 1623, though Carolus Linnaeus later standardized and popularized it in the 18th century. The correct answer is (A).
The key here is the phrase “for the first time.” Many students immediately think of Linnaeus because he is the father of modern taxonomy and the one who made binomial nomenclature the universal standard. However, the first use of the two-name system (genus + species) predates Linnaeus by over a century. Gaspard Bauhin, a Swiss botanist, used this method in his work Pinax Theatri Botanici (1623) to name plants. Linnaeus later adopted and refined the system, but he did not invent it.
Let’s break it down:
-
What is binomial nomenclature?
It is the formal system of naming species using two Latinized names: the genus (capitalized) and the species (lowercase), e.g., Homo sapiens. The question asks who first introduced this concept.
-
Evaluate each option:
- (A) Gaspard Bauhin (1623): He published Pinax Theatri Botanici, where he consistently used a two-word name for each plant species. This is the earliest documented use of binomial nomenclature in a systematic way.
- (B) Carolus Von Linnaeus (18th century): He is credited with standardizing binomial nomenclature in his Species Plantarum (1753) and Systema Naturae (10th edition, 1758). But he was not the first to use it. …
-
- AP EAPCET 2021Set ap-2021-10-05-FN1 markMCQQ.The Binomial Nomenclature was popularised by _________ (A) Lamarck (B) Jenner (C) Linnaeus (D) Whittaker
›Reveal solutionSolution
This tests basic taxonomy history — binomial nomenclature was popularised by Linnaeus.
Concept and Intuition
Binomial nomenclature assigns each species a two-part Latinised name (genus + specific epithet), e.g., Mangifera indica. While earlier naturalists used various naming conventions, it was Carolus Linnaeus, the 18th-century Swedish botanist, who systematised and popularised this two-name convention across the biological world, laying the foundation of modern taxonomy.
Step-by-Step Solution
- Recall who is credited with popularising binomial nomenclature in biology — Linnaeus. …
- AP EAPCET 2021Set ap-2021-10-05-FN1 markMCQQ.Scientific name of Parrot _________ (A) Heirococcyx (B) Eudynamys (C) Passer (D) Psittacula
›Reveal solutionSolution
This tests recall of common scientific/binomial names of familiar animals — the parrot's genus is Psittacula.
Concept and Intuition
Binomial nomenclature assigns a genus and species name to every organism. Common Indian birds have well-known scientific genus names taught in basic zoology: the rose-ringed parakeet (common parrot) belongs to genus Psittacula (e.g., Psittacula krameri); Eudynamys is the genus of the Asian koel (a cuckoo); Hierococcyx (spelled with an 'H') is the genus of hawk-cuckoos; Passer is the genus of sparrows (e.g., house sparrow, Passer domesticus).
Step-by-Step Solution
- Eliminate Heirococcyx/Hierococcyx — this is a cuckoo genus (hawk-cuckoo), not a parrot.
- Eliminate Eudynamys — genus of the koel, also a cuckoo-family bird, not a parrot. …
🎓Unlock everything free for 14 days
- ✓Full step-by-step solutions
- ✓Concept-first explanations
- ✓Methods, shortcuts & mistakes
- ✓PYQ mapping + timed mock tests
Full access for 14 days. No credit card required.