The Living WorldNEET Botany · Class 11 · NCERT Chapter 1

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.

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.

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.

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.

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.

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.