NEET Biology · NCERT Class 11 · Chapter 1
The Living World: 30 NEET questions, every answer explained
Chapter 1 reads like an introduction and marks like a memory test. NEET keeps returning to the order of the taxonomic categories, which half of a binomial is capitalised, and which of the herbarium, museum, botanical garden and key actually does what.
Where the marks go
What NEET actually asks in The Living World
- Hierarchy in the right orderSpecies up to kingdom, and what happens to shared characters on the way up. A reversed sequence is the most common wrong option here.
- Binomial nomenclature rulesGenus capitalised, species not, both italicised, the author abbreviated after the species name. Every rule has a matching distractor.
- Taxonomical aidsHerbarium, botanical garden, museum, zoological park, key, flora, manual and monograph. The exam swaps their definitions around.
Free questions
30 solved MCQs, answer marked and reasoning written out
Every question below is free to read — no sign-up, no email. 2 of them are real questions from past NEET papers. The other 125 questions in this chapter are in the book and in practice access.
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Q1 Multi-statement analysis
Regarding the taxonomic hierarchy: (i) as we go higher from species to kingdom the number of common characteristics goes on decreasing (ii) lower the taxa, more are the characteristics the members share (iii) higher the category, greater the difficulty of determining relationships (iv) the problem of classification becomes simpler at higher categories. How many are correct?
- 1.One
- 2.Two
- 3.ThreeCorrect answer
- 4.Four
Why option 3 is the answer
The trap: (i)–(iii) correct; the problem of classification becomes MORE COMPLEX at higher categories, so (iv) is wrong.
What this is testing: what happens as you climb the taxonomic ladder.
(i) is correct. Going up from species to kingdom, the number of shared characters falls.
(ii) is correct. The lower the taxon, the more its members have in common.
(iii) is correct. The higher the category, the harder it is to work out relationships.
(iv) is the trap, and it is the exact reverse of (iii). Classification becomes MORE complex at higher categories, not simpler. Whenever two statements in the same question point in opposite directions, one of them is the planted error.So three are correct.
Climb the hierarchy and shared characters fall away. That is why relationships get harder to trace at the top.
NCERT Class 11 Biology, page 8
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Q2 Multi-statement analysis
Regarding taxonomic categories: (i) classification is not a single step process (ii) it involves a hierarchy of steps (iii) each step represents a rank or category (iv) all categories together constitute the taxonomic hierarchy. How many are correct?
- 1.One
- 2.Two
- 3.Three
- 4.FourCorrect answer
Why option 4 is the answer
The trap: All four are correct.
What this is testing: whether classification happens in one step or many.
All four are correct.
(i) Classification is not a single step.
(ii) It involves a hierarchy of steps.
(iii) Each step represents a rank or category.
(iv) All the categories together make up the taxonomic hierarchy.These four statements are really one idea said four ways, so they stand or fall together. When statements agree with each other and with the book, the answer is usually all of them.
So all four are correct.
Classification is a ladder, not a single step. Each rung holds fewer shared characters than the one below.
NCERT Class 11 Biology, page 6
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Q3 Multi-statement analysis
Regarding binomial nomenclature: (i) each name has two components, the generic name and the specific epithet (ii) the system was given by Carolus Linnaeus (iii) it is practised by biologists all over the world (iv) the two-word format was found inconvenient. How many are correct?
- 1.One
- 2.Two
- 3.ThreeCorrect answer
- 4.Four
Why option 3 is the answer
The trap: (i)–(iii) correct; the two-word format was found CONVENIENT, so (iv) is wrong.
What this is testing: whether you know what binomial nomenclature is, and who gave it.
(i) is correct. Every scientific name has two parts — the genus name first, then the specific epithet. In Mangifera indica, Mangifera is the genus and indica is the species.
(ii) is correct. Carolus Linnaeus gave this system.
(iii) is correct. Biologists in every country use it, which is the whole point: one organism, one name, everywhere.
(iv) is the trap. The two-word format was found CONVENIENT, not inconvenient — that is exactly why the world accepted it. One true fact has been reversed by swapping a single word.
So three statements are correct.
Two words, Linnaeus, worldwide. Binomial nomenclature replaced names that once ran to a dozen words.
NCERT Class 11 Biology, page 4
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Q4 Multi-statement analysis
Regarding systematics: (i) the word is derived from the Latin word 'systema' (ii) 'systema' means systematic arrangement of organisms (iii) Linnaeus used Systema Naturae as the title of his publication (iv) systematics does not consider evolutionary relationships. How many are correct?
- 1.One
- 2.Two
- 3.ThreeCorrect answer
- 4.Four
Why option 3 is the answer
The trap: (i)–(iii) correct; systematics DOES take into account evolutionary relationships, so (iv) is wrong.
What this is testing: where the word systematics comes from and what it covers.
(i) is correct. It comes from the Latin word systema.
(ii) is correct. Systema means the systematic arrangement of organisms.
(iii) is correct. Linnaeus published Systema Naturae.
(iv) is the trap. Systematics DOES take evolutionary relationships into account. The statement denies the very thing that makes systematics more than sorting.So three are correct.
Systema Naturae gave systematics its name. The modern subject adds evolutionary relationships to Linnaeus's arrangement.
NCERT Class 11 Biology, page 6
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Q5 Multi-statement analysis
Regarding biodiversity: (i) the number of species known and described ranges between 1.7 and 1.8 million (ii) biodiversity refers to the number and types of organisms present on earth (iii) new organisms are continuously being identified as we explore new areas (iv) each different kind of organism represents a genus. How many are correct?
- 1.One
- 2.Two
- 3.ThreeCorrect answer
- 4.Four
Why option 3 is the answer
The trap: (i)–(iii) correct; each different kind of organism represents a SPECIES, not a genus, so (iv) is wrong.
What this is testing: the biodiversity figures on the first page of the chapter.
(i) is correct. Between 1.7 and 1.8 million species are known and described.
(ii) is correct. Biodiversity means the number and types of organisms on earth.
(iii) is correct. New organisms keep being found as new areas are explored.
(iv) is the trap. Each different kind of organism represents a SPECIES, not a genus. A genus contains several species, so the words are not interchangeable.So three are correct.
Between 1.7 and 1.8 million described so far, with more found each year. The number is a floor, not a total.
NCERT Class 11 Biology, page 3
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Q6 Multi-statement analysis
Regarding the genus: (i) it comprises a group of related species (ii) these species have more characters in common compared with species of other genera (iii) genera are aggregates of closely related species (iv) potato and brinjal belong to different genera. How many are correct?
- 1.One
- 2.Two
- 3.ThreeCorrect answer
- 4.Four
Why option 3 is the answer
The trap: (i)–(iii) correct; potato and brinjal both belong to the genus SOLANUM, so (iv) is wrong.
What this is testing: what a genus is, with a familiar example.
(i) is correct. A genus is a group of related species.
(ii) is correct. Its species share more characters with each other than with species of other genera.
(iii) is correct. Genera are aggregates of closely related species.
(iv) is the trap. Potato and brinjal are both in the genus SOLANUM — Solanum tuberosum and Solanum melongena. They look nothing alike as vegetables, which is why this catches people.So three are correct.
Potato and brinjal are both Solanum, different species of one genus. Familiar difference does not mean taxonomic distance.
NCERT Class 11 Biology, page 7
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Q7 Multi-statement analysis
Regarding phylum: (i) classes comprising fishes, amphibians, reptiles, birds and mammals constitute the phylum Chordata (ii) they share the presence of a notochord (iii) they share a dorsal hollow neural system (iv) in plants, classes with a few similar characters are assigned to a phylum. How many are correct?
- 1.One
- 2.Two
- 3.ThreeCorrect answer
- 4.Four
Why option 3 is the answer
The trap: (i)–(iii) correct; in PLANTS the corresponding category is the DIVISION, so (iv) is wrong.
What this is testing: the phylum, and what the same rank is called in plants.
(i) is correct. Fishes, amphibians, reptiles, birds and mammals together form the phylum Chordata.
(ii) is correct. They share a notochord.
(iii) is correct. They share a dorsal hollow neural system.
(iv) is the trap. In PLANTS the equivalent category is called a DIVISION, not a phylum. The rank is the same; the word is not.So three are correct.
Phylum in animals, division in plants. Same rank, two names, depending on the kingdom.
NCERT Class 11 Biology, page 8
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Q8 Multi-statement analysis
Regarding the earliest classifications: (i) human beings needed sources of food, clothing and shelter (ii) the earliest classifications were based on the 'uses' of organisms (iii) humans have always been interested in knowing about organisms (iv) the earliest classifications were based on evolutionary relationships. How many are correct?
- 1.One
- 2.Two
- 3.ThreeCorrect answer
- 4.Four
Why option 3 is the answer
The trap: (i)–(iii) correct; the earliest classifications were based on USES, not evolutionary relationships, so (iv) is wrong.
What this is testing: what the earliest classifications were based on.
(i) is correct. Early humans needed food, clothing and shelter.
(ii) is correct. The earliest classifications grouped organisms by their uses.
(iii) is correct. Humans have always been curious about organisms around them.
(iv) is the trap. The earliest classifications were based on USES, not evolutionary relationships. Evolution came much later — early people were asking what a plant was good for, not where it sat on a family tree.So three are correct.
The earliest classifications sorted organisms by usefulness. Modern taxonomy sorts them by relationship, which is a completely different question.
NCERT Class 11 Biology, page 5
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Q9 Assertion and Reason
AssertionWheat is placed in the class Dicotyledonae.
ReasonWheat, Triticum aestivum, belongs to the family Poaceae and the division Angiospermae.
- 1.Both A and R are true and R is the correct explanation of A
- 2.Both A and R are true but R is not the correct explanation of A
- 3.A is true but R is false
- 4.A is false but R is trueCorrect answer
Why option 4 is the answer
The trap: A is false — wheat is a MONOCOTYLEDON; R is true.
What this is testing: where wheat sits in the plant classification.
A says wheat is in class Dicotyledonae. False — wheat is a MONOCOTYLEDON. It is a grass, and grasses are monocots.
R says wheat, Triticum aestivum, belongs to family Poaceae and division Angiospermae. True, and both facts are in the chapter table.A false and R true is code (4).
The trap: R is packed with correct detail, and a correct-sounding R makes students assume A must be correct too. Judge A entirely on its own before you even read R.
NCERT Class 11 Biology, page 8
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Q10 Assertion and Reason
AssertionSpecies is the lowest taxonomic category.
ReasonA species is a group of individual organisms with fundamental similarities, distinguishable from closely related species by distinct morphological differences.
- 1.Both A and R are true and R is the correct explanation of A
- 2.Both A and R are true but R is not the correct explanation of ACorrect answer
- 3.A is true but R is false
- 4.A is false but R is true
Why option 2 is the answer
The trap: Both are true of the species; its definition is a parallel fact and does not by itself explain its position at the bottom of the hierarchy.
What this is testing: whether a definition explains a position.
A says species is the lowest taxonomic category. True.
R gives the definition of a species — a group with fundamental similarities, told apart from close relatives by clear differences in form. Also true.Both true, but R does not explain A, so the code is (2).
The trap, and it is the commonest one in this whole format: two true statements about the same topic feel connected. Ask specifically — does R answer the question "why?" for A. Knowing what a species IS does not tell you why it sits at the BOTTOM of the ladder.
NCERT Class 11 Biology, page 6
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Q11 Assertion and Reason
AssertionClassification is a single step process.
ReasonClassification involves a hierarchy of steps in which each step represents a rank or category.
- 1.Both A and R are true and R is the correct explanation of A
- 2.Both A and R are true but R is not the correct explanation of A
- 3.A is true but R is false
- 4.A is false but R is trueCorrect answer
Why option 4 is the answer
The trap: A is false; R is true.
What this is testing: whether classification happens in one step.
A says classification is a single step process. False. It is a series of steps.
R says classification involves a hierarchy of steps, each step a rank or category. True — and it is precisely what makes A false.A false and R true is code (4).
The trap: R quietly contradicts A. When the two lines disagree with each other, one of them must be wrong; work out which, and the code follows.
NCERT Class 11 Biology, page 6
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Q12 Assertion and Reason
AssertionThe number of described species ranges between 1.7 and 1.8 million.
ReasonNew organisms are continuously being identified as we explore new areas and even old ones.
- 1.Both A and R are true and R is the correct explanation of A
- 2.Both A and R are true but R is not the correct explanation of ACorrect answer
- 3.A is true but R is false
- 4.A is false but R is true
Why option 2 is the answer
The trap: Both are true of biodiversity; continued discovery is a parallel fact and does not explain the present count.
What this is testing: two separate facts about biodiversity.
A says the number of described species is between 1.7 and 1.8 million. True.
R says new organisms are continuously being identified as we explore. True.Both true, but R does not explain A, so the code is (2).
The trap: R feels like it explains the number, but it does the opposite — it explains why the number keeps CHANGING, not why it is 1.7 to 1.8 million today. Read R as an answer to "why is A true?" and it does not fit.
NCERT Class 11 Biology, page 3
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Q13 Assertion and Reason
AssertionThe scientific names of organisms are acceptable to biologists all over the world.
ReasonEach scientific name has two components, the generic name and the specific epithet.
- 1.Both A and R are true and R is the correct explanation of A
- 2.Both A and R are true but R is not the correct explanation of ACorrect answer
- 3.A is true but R is false
- 4.A is false but R is true
Why option 2 is the answer
The trap: Both are true of scientific names; the two-part format is a parallel fact and does not explain their universal acceptance.
What this is testing: why scientific names are accepted everywhere.
A says scientific names are acceptable to biologists worldwide. True.
R says each name has two parts, the generic name and the specific epithet. True.Both true, R does not explain A, so the code is (2).
The trap: the two-part format is a rule ABOUT the names, not the reason the world accepted them. They are accepted because they are standardised and governed by agreed codes. Having two words is not what makes a name universal.
NCERT Class 11 Biology, page 4
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Q14 Assertion and Reason
AssertionOrder Primata is placed in the class Mammalia.
ReasonClass Mammalia also includes the order Carnivora, which contains the tiger, cat and dog.
- 1.Both A and R are true and R is the correct explanation of A
- 2.Both A and R are true but R is not the correct explanation of ACorrect answer
- 3.A is true but R is false
- 4.A is false but R is true
Why option 2 is the answer
The trap: Both are true of the class Mammalia running in parallel; the presence of Carnivora does not explain the inclusion of Primata.
What this is testing: two orders that both sit in class Mammalia.
A says order Primata is placed in class Mammalia. True.
R says Mammalia also includes order Carnivora, containing tiger, cat and dog. True.Both true, R does not explain A, so the code is (2).
The trap: the two lines sit side by side rather than one causing the other. Carnivora being a mammal order tells you nothing about why Primata is one. Two facts about the same class are still two facts.
NCERT Class 11 Biology, page 7
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Q15 Assertion and Reason
AssertionPlants are named according to the ICBN.
ReasonAnimal taxonomists have evolved the International Code of Zoological Nomenclature.
- 1.Both A and R are true and R is the correct explanation of A
- 2.Both A and R are true but R is not the correct explanation of ACorrect answer
- 3.A is true but R is false
- 4.A is false but R is true
Why option 2 is the answer
The trap: Both are true statements about the codes of nomenclature running in parallel; the existence of the ICZN does not explain the use of the ICBN for plants.
What this is testing: the two codes of nomenclature.
A says plants are named according to the ICBN. True.
R says animal taxonomists developed the ICZN. True.Both true, R does not explain A, so the code is (2).
The trap: the two codes are a matched pair, so they feel linked. But the existence of an animal code does not explain why plants use the botanical one. Two parallel rules, not a cause and its effect.
NCERT Class 11 Biology, page 4
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Q16 Assertion and Reason
AssertionThe specific epithet of the lion is Panthera.
ReasonIn the name Panthera leo, Panthera is the genus and leo is the specific epithet.
- 1.Both A and R are true and R is the correct explanation of A
- 2.Both A and R are true but R is not the correct explanation of A
- 3.A is true but R is false
- 4.A is false but R is trueCorrect answer
Why option 4 is the answer
The trap: A is false; R is true.
What this is testing: which half of a name is the specific epithet.
A says the specific epithet of the lion is Panthera. False — Panthera is the GENUS.
R says that in Panthera leo, Panthera is the genus and leo is the specific epithet. True.A false and R true is code (4).
The trap: R actually contains the correction to A, sitting right underneath it. If R and A disagree about the same fact, read R carefully — it often tells you exactly why A is wrong.
NCERT Class 11 Biology, page 6
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Q17 Assertion and Reason
AssertionTaxonomic groups are distinct biological entities.
ReasonTaxonomic categories and hierarchy can be illustrated by the example of insects, which share three pairs of jointed legs.
- 1.Both A and R are true and R is the correct explanation of A
- 2.Both A and R are true but R is not the correct explanation of ACorrect answer
- 3.A is true but R is false
- 4.A is false but R is true
Why option 2 is the answer
The trap: Both are true statements about taxonomic categories running in parallel; the insect example does not explain why the groups are biological rather than merely morphological entities.
What this is testing: whether an example explains a definition.
A says taxonomic groups are distinct biological entities. True.
R says categories and hierarchy can be illustrated using insects, which share three pairs of jointed legs. True.Both true, R does not explain A, so the code is (2).
The trap: an example is not an explanation. The insect illustration shows how the hierarchy works; it does not explain why taxonomic groups are real biological entities rather than mere lookalikes.
NCERT Class 11 Biology, page 6
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Q18 Statement I and Statement II
Statement ISystematics takes into account evolutionary relationships between organisms.
Statement IILinnaeus used Systema Naturae as the title of his publication.
- 1.Both Statement I and Statement II are correctCorrect answer
- 2.Both Statement I and Statement II are incorrect
- 3.Statement I is correct but Statement II is incorrect
- 4.Statement I is incorrect but Statement II is correct
Why option 1 is the answer
The trap: Both statements are correct.
What this is testing: the scope of systematics and Linnaeus's book.
Statement I says systematics takes evolutionary relationships into account. Correct — that is what makes it more than sorting.
Statement II says Linnaeus used Systema Naturae as the title of his publication. Correct.Both correct, so the answer is (1).
Two unrelated but true facts sit side by side here. In this format, unlike Assertion and Reason, you are not asked whether one explains the other — only whether each is true.
NCERT Class 11 Biology, page 6
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Q19 Statement I and Statement II
Statement IThe order Carnivora includes the families Felidae and Canidae.
Statement IIThe plant families Convolvulaceae and Solanaceae are included in the order Polymoniales.
- 1.Both Statement I and Statement II are correctCorrect answer
- 2.Both Statement I and Statement II are incorrect
- 3.Statement I is correct but Statement II is incorrect
- 4.Statement I is incorrect but Statement II is correct
Why option 1 is the answer
The trap: Both statements are correct.
What this is testing: one animal order and one plant order.
Statement I says the order Carnivora includes families Felidae and Canidae. Correct.
Statement II says Convolvulaceae and Solanaceae are included in the order Polymoniales. Correct.Both correct, so the answer is (1).
Both examples are given in the chapter, one from each kingdom. Nothing is planted here.
Carnivora holds Felidae and Canidae; Polymoniales holds Convolvulaceae and Solanaceae. One animal order and one plant order, each with two families.
NCERT Class 11 Biology, page 7
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Q20 Statement I and Statement II
Statement IAs we go higher from species to kingdom, the number of common characteristics increases.
Statement IILower the taxa, more are the characteristics that the members within the taxon share.
- 1.Both Statement I and Statement II are correct
- 2.Both Statement I and Statement II are incorrect
- 3.Statement I is correct but Statement II is incorrect
- 4.Statement I is incorrect but Statement II is correctCorrect answer
Why option 4 is the answer
The trap: I incorrect (common characteristics DECREASE upwards); II correct.
What this is testing: the direction of the hierarchy rule.
Statement I says the number of common characteristics INCREASES as we go from species to kingdom. Wrong — it decreases. The higher you go, the less members have in common.
Statement II says the lower the taxon, the more characteristics its members share. Correct, and it is the same rule stated correctly.So I incorrect, II correct, giving (4).
The two statements contradict each other, which is your signal. Learn the rule once in one direction: going up, shared features go down.
NCERT Class 11 Biology, page 8
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Q21 Match the columns
Match the animal with its family:
Column I Column II (a) Lion (i) Hominidae (b) Cat (iii) Canidae (c) Dog (ii) Felidae (d) Man (iv) Felidae - 1.(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)
- 2.(a)-(iv), (b)-(iii), (c)-(ii), (d)-(i)
- 3.(a)-(iv), (b)-(ii), (c)-(iii), (d)-(i)Correct answer
- 4.(a)-(i), (b)-(ii), (c)-(iii), (d)-(iv)
Why option 3 is the answer
The trap: Lion and cat-Felidae, dog-Canidae, man-Hominidae.
What this is testing: which family each animal belongs to.
Lion is Felidae. Cat is also Felidae. Dog is Canidae. Man is Hominidae.
That gives (a)-(iv), (b)-(ii), (c)-(iii), (d)-(i) — option 3.
Lion and cat share a family despite the difference in size; dog is separate despite living alongside cats. Size and familiarity are not taxonomic evidence.
NCERT Class 11 Biology, page 7
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Q22 Match the columns
Match the plant category with the correct name for animals:
Column I Column II (a) Division (ii) an animal phylum (b) Phylum (iii) a plant division (c) Chordata (iv) used for animals (d) Angiospermae (i) equivalent to phylum - 1.(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
- 2.(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
- 3.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
- 4.(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)Correct answer
Why option 4 is the answer
The trap: Division is the plant equivalent of the animal phylum.
What this is testing: the plant word and the animal word for the same rank.
Division is the plant equivalent of phylum. Phylum is the term used for animals. Chordata is an animal phylum. Angiospermae is a plant division.
That gives (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii) — option 4.
One rank, two names. Chordata and Angiospermae are the standard examples of each, so learning the pair of examples fixes the pair of terms.
NCERT Class 11 Biology, page 8
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Q23 Match the columns
Match the order with its members:
Column I Column II (a) Primata (iii) housefly (b) Carnivora (ii) Convolvulaceae and Solanaceae (c) Polymoniales (iv) tiger, cat, dog (d) Diptera (i) monkey, gorilla, gibbon - 1.(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
- 2.(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)Correct answer
- 3.(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
- 4.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
Why option 2 is the answer
The trap: Primata-primates, Carnivora-carnivores, Polymoniales-plant families, Diptera-housefly.
What this is testing: which members belong to which order.
Primata has monkey, gorilla and gibbon. Carnivora has tiger, cat and dog. Polymoniales has the plant families Convolvulaceae and Solanaceae. Diptera has the housefly.
That gives (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii) — option 2.
Notice that Polymoniales is matched with FAMILIES while the others are matched with animals. An order is an assemblage of families, so both kinds of answer are correct at their own level.
NCERT Class 11 Biology, page 7
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Q24 Match the columns
Match the rule with the example:
Column I Column II (a) Genus capitalised (iv) indica (b) Specific epithet in small letters (iii) Mangifera indica (c) Author's name abbreviated (i) Mangifera (d) Name italicised (ii) Linn. - 1.(a)-(i), (b)-(iv), (c)-(ii), (d)-(iii)Correct answer
- 2.(a)-(iv), (b)-(i), (c)-(ii), (d)-(iii)
- 3.(a)-(i), (b)-(ii), (c)-(iv), (d)-(iii)
- 4.(a)-(iii), (b)-(iv), (c)-(ii), (d)-(i)
Why option 1 is the answer
The trap: The rules of binomial nomenclature illustrated by Mangifera indica Linn.
What this is testing: each writing rule against its example, using Mangifera indica Linn.
Genus capitalised — Mangifera. Specific epithet in small letters — indica. Author's name abbreviated — Linn. Name italicised — Mangifera indica.
That gives (a)-(i), (b)-(iv), (c)-(ii), (d)-(iii) — option 1.
This single name carries every rule in the chapter. If you can write Mangifera indica Linn. correctly from memory, you have the whole of binomial nomenclature.
NCERT Class 11 Biology, page 5
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Q25 Exception / incorrect
All are true of the rules of nomenclature EXCEPT:
- 1.the author's name is written in italicsCorrect answer
- 2.names are generally in Latin
- 3.names are written in italics
- 4.when handwritten, both words are separately underlined
Why option 1 is the answer
The trap: The author's name is not italicised.
What this is testing: which parts of a name are italicised.
Names are generally in Latin — true. Names are written in italics — true. When handwritten, both words are separately underlined — true. The author's name is written in italics — FALSE.
So the exception is the italicised author name.
The two name words are italicised; the author's abbreviation after them is not. It sits outside the name proper.
NCERT Class 11 Biology, page 5
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Q26 Exception / incorrect
All are characters used in modern taxonomic studies EXCEPT:
- 1.external structure
- 2.internal structure
- 3.structure of the cell
- 4.local namesCorrect answer
Why option 4 is the answer
The trap: Local names vary from place to place and are not taxonomic characters.
What this is testing: what counts as a taxonomic character.
External structure, internal structure and cell structure are all used in modern taxonomy, along with development and ecology. LOCAL NAMES are not a character of the organism at all — they are what people in one place happen to call it, and they change from village to village.
So the exception is local names.
That variability is exactly why scientific names exist.
A local name is a fact about people, not about the organism. Everything else on the list can be observed in the specimen itself.
NCERT Class 11 Biology, page 5
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Q27 Sequence / ordering
Correct taxonomic sequence for man:
- 1.Homo → Primata → Hominidae → Mammalia
- 2.Hominidae → Homo → Mammalia → Primata
- 3.Mammalia → Primata → Homo → Hominidae
- 4.Homo → Hominidae → Primata → Mammalia → ChordataCorrect answer
Why option 4 is the answer
The trap: Genus → family → order → class → phylum.
What this is testing: the classification of man in the correct order.
Homo (genus), Hominidae (family), Primata (order), Mammalia (class), Chordata (phylum).
Only the fourth option runs genus, family, order, class, phylum, so it is the answer.
Two things to check in this format: that the ranks ascend, and that the sequence is complete. Options that stop early or shuffle two terms are the usual distractors.
NCERT Class 11 Biology, page 8
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Q28 Sequence / ordering
Correct taxonomic sequence for the housefly:
- 1.Muscidae → Musca → Insecta → Diptera
- 2.Diptera → Musca → Muscidae → Insecta
- 3.Insecta → Diptera → Muscidae → Musca
- 4.Musca → Muscidae → Diptera → Insecta → ArthropodaCorrect answer
Why option 4 is the answer
The trap: Genus → family → order → class → phylum.
What this is testing: the classification of the housefly in order.
Musca (genus), Muscidae (family), Diptera (order), Insecta (class), Arthropoda (phylum).
Only the fourth option follows that sequence.
Musca and Muscidae look nearly identical, which makes them easy to swap, and swapping them is exactly what the wrong options do. The shorter word is the genus; the -idae ending is the family.
NCERT Class 11 Biology, page 8
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Q29 NEET 2026 (Re-Exam)
Correct order of the following taxonomic categories, from Species up to Kingdom:
- 1.Species → Genus → Family → Order → Class → Phylum → KingdomCorrect answer
- 2.Species → Family → Genus → Order → Class → Phylum → Kingdom
- 3.Genus → Species → Family → Order → Class → Phylum → Kingdom
- 4.Species → Genus → Order → Family → Class → Phylum → Kingdom
Why option 1 is the answer
The trap: The hierarchy ascends from the most specific (Species) to the most general (Kingdom): Species, Genus, Family, Order, Class, Phylum, Kingdom.
What this is testing: the taxonomic ladder read UPWARDS, from the most specific rank to the most general.
Going up: Species, Genus, Family, Order, Class, Phylum, Kingdom. Each step holds more organisms and fewer shared characters than the one below it.
Why the others are wrong: option 2 puts Family before Genus - but genera group into families, so Genus must come first. Option 3 starts with Genus above Species, reversing the bottom two. Option 4 puts Order before Family, which again skips a rung.
The trap: every option contains the same seven words, so nothing looks wrong at a glance. Fix the ladder in one direction in your head, then check the options against it rung by rung rather than reading them as whole sentences.
NCERT Class 11 Biology, page 8
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Q30 NEET 2022
Which represents the correct hierarchical arrangement of taxonomic categories, from Kingdom down to Species, in the case of animals?
- 1.Kingdom, Class, Phylum, Family, Order, Genus, Species
- 2.Kingdom, Order, Class, Phylum, Family, Genus, Species
- 3.Kingdom, Order, Phylum, Class, Family, Genus, Species
- 4.Kingdom, Phylum, Class, Order, Family, Genus, SpeciesCorrect answer
Why option 4 is the answer
The trap: The standard hierarchy descends Kingdom, Phylum, Class, Order, Family, Genus, Species.
What this is testing: the animal hierarchy read DOWNWARDS, from Kingdom to Species.
Going down: Kingdom, Phylum, Class, Order, Family, Genus, Species. That is option 4.
Why the others are wrong: option 1 swaps Class and Phylum, and also swaps Family and Order. Option 2 puts Order immediately after Kingdom, jumping over Phylum and Class. Option 3 puts Order and Phylum in each other's places.
The trap: three of the four options are the correct list with just one pair exchanged, which is very hard to see by reading. Write your own ladder first, then compare. Note also that this question says ANIMALS - the same rank is called Division in plants.
NCERT Class 11 Biology, page 8
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