How many questions come from The Living World in NEET 2027?

You can expect 1 to 2 questions from The Living World in NEET 2027. The chapter has low-to-medium PYQ frequency. The most tested topics are binomial nomenclature rules, taxonomic ranks in order, and scientific names of common organisms like Mangifera indica and Homo sapiens.

What are the seven taxonomic categories in order?

The seven ranks from highest to lowest are: Kingdom, Phylum (or Division for plants), Class, Order, Family, Genus, Species. A helpful mnemonic is "King Philip Came Over For Good Soup." The species is the most specific rank; kingdom is the broadest.

What are the rules of binomial nomenclature?

There are four key rules: (1) The scientific name has two parts: genus (capitalized) followed by species epithet (lowercase). (2) Both words are written in italics when printed and underlined when handwritten. (3) The author who first publishes the name is written after it in abbreviated form. (4) The principle of priority applies: the first published name is the valid one. ICBN governs plant names; ICZN governs animal names.

Are viruses considered living or non-living?

Viruses are on the boundary. They are not considered truly living because they lack cellular organization, cannot carry out metabolism independently, and can only reproduce inside a host cell. However, they do carry genetic material (DNA or RNA) and show heredity. NEET treats viruses as acellular entities, not classified in the five kingdoms.

What is the difference between a herbarium and a botanical garden?

A herbarium stores dried, pressed, and mounted plant specimens on sheets for permanent reference. Famous examples include the Central National Herbarium in Kolkata (Botanical Survey of India). A botanical garden keeps living plants growing in maintained grounds for study and conservation. Famous examples include the Royal Botanic Gardens at Kew and Acharya Jagadish Chandra Bose Indian Botanic Garden in Kolkata.

What is a dichotomous key and how is it used?

A dichotomous key is a taxonomic aid that helps identify an unknown organism through a series of paired statements. At each step, you choose between two contrasting options that describe the organism. Each choice leads to the next pair of statements until you reach the name of the organism. It is the most common type of taxonomic key used in field identification.

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The Living WorldNEET Botany · Class 11 · NCERT Chapter 1

Overview Notes NEET Questions Interactive Learning

8 NEET previous-year questions on The Living World, each with the correct answer and a step-by-step solution. Sourced directly from official NEET papers across every booklet code.

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All (8)

The Living World (8)

Biological names can be written in any language

The first words in a biological name represents the genus name, and the second is a specific epithet

The names are written in Latin and are italicized

When written by hand, the names are to be underlined

Solution

According to the rules of IUCN the original names were taken from Latin or Greek languages. New names are now derived either from Latin language or are Latinized.

Nostoc

Mycobacterium

Saccharomyces

Oscillatoria

Solution

Saccharomyces is a eukaryotic genus of yeasts, while Nostoc, Mycobacterium, and Oscillatoria are prokaryotes. NCERT XI chapter The Living World classifies Saccharomyces as a eukaryote, so option (c) is correct.

(ii) (iv) (i) (iii)

(v) (i) (ii) (iii)

(v) (iv) (i) (i)

(v) (iv) (i) (iii)

Solution

Factual- NCERT

Cyanobacteria are a group of autotrophic organisms classified under kingdom Monera .

Bacteria are exclusively heterotrophic organisms.

Slime moulds are saprophytic organisms classified under Kingdom Monera.

Mycoplasma have DNA, ribosome and cell wall.

Solution

Slime moulds are classified under kingdom Protista. Mycoplasma lack cell wall. Bacteria can be autotrophic as well as heterotrophic.

Solution

Hückel's rule states that aromatic compounds must have a planar ring with delocalized $π$ electrons and follow the $4 n + 2$ rule. Applying this, naphthalene, cyclopentadienyl anion, cyclopropenyl anion, and anthracene are aromatic, so the correct number is 4. Option (b) is correct.

1/12

1/2

1/3

1/4

Solution

In a face-centered cubic (fcc) unit cell, each edge-centered octahedral void is shared by four unit cells. Therefore, the fraction of one edge-centered octahedral void that lies in one unit cell is $\frac{1}{4}$ . Option (d) is correct.

A bio-reactor provides optimal growth conditions for achieving the desired product

Most commonly used bio-reactors are of stirring type

Bio-reactors are used to produce small scale bacterial cultures

Bio-reactors have an agitator system, an oxygen delivery system and foam control system

Solution

Correct answer is option (3) The statement (3) is incorrect because bioreactors are used for processing of large volumes (100 – 1000 litres) of culture. Small volume cultures cannot yield appreciable quantities of products. To produce in large quantities the development of bioreactors is required. - 63 - NEET (UG)-2024 (Code-Q1)

Physico-chemical approach to study and understand living organisms

Physiological approach to study and understand living organisms

Chemical approach to study and understand living organisms

Behavioural approach to study and understand living organisms

Solution

Reductionist Biology involves the physico-chemical approach to study and understand living organisms by breaking them down into simpler components. NCERT XI chapter The Living World defines reductionism as the approach that reduces complex biological systems to their simplest components for study, so option (a) is correct.

The Living WorldNEET Botany · Class 11 · NCERT Chapter 1

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The Living WorldNEET Botany · Class 11 · NCERT Chapter 1

1NEET 2016Medium4 bookletsNomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature?

2NEET 2018Medium20 bookletsWhich among the following is not a prokaryote ?

3NEET 2019Medium3 bookletsMatch the following hormones with the respective diseases: (a) Insulin (i) Addison’s disease (b) Thyroxin (ii) Diabetes insipidus (c) Corticoids (iii) Acromegaly (d) Growth Hormone (iv) Goiter (v) Diabetes mellitus Select the correct option. (a) (b) (c) (d)

4NEET 2022Medium24 bookletsWhich of the following is a correct statement?

6NEET 2023Medium24 bookletsWhat fraction of one edge centred octahedral void lies in one unit cell of fcc?

7NEET 2024Medium24 bookletsWhich of the following statements is incorrect?

8NEET 2025Medium4 bookletsWhich one of the following statements refers to Reductionist Biology?

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