NCERT Solutions for Class 11 Biology Chapter 1 The Living World
NCERT Solutions for Class 11 Biology Chapter 1 The Living World covers the diversity of living organisms, characteristics that define life, the need for classification and nomenclature, and taxonomic categories and hierarchy.
Overview of Topics & Subtopics (Click to Jump)
1. What is Living?
Short Note:
• Living organisms show characteristics such as growth, reproduction, metabolism, cellular organisation, consciousness, and the ability to sense and respond to stimuli.
• Metabolism is a defining feature exclusive to living organisms — it is the sum total of all chemical reactions occurring in an organism's body.
• Growth in living organisms is from inside (intrinsic), whereas non-living things can grow by accumulation of material on the surface (extrinsic).
2. Nomenclature and Classification
Short Note:
• Binomial Nomenclature (given by Carl Linnaeus) assigns each species a two-part scientific name: genus name + specific epithet, written in italics (e.g., Mangifera indica).
• Taxonomy is the branch of science dealing with identification, nomenclature, and classification of organisms.
3. Taxonomic Categories and Hierarchy
Short Note:
• The taxonomic hierarchy, from broadest to narrowest, is: Kingdom → Phylum/Division → Class → Order → Family → Genus → Species.
• Species is the basic taxonomic unit/category, representing a group of similar organisms capable of interbreeding.
NCERT Textbook Exercise Questions
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These short notes are designed for quick revision. Read the main points once, then use the related material below to practise the same chapter. Revising a concept and checking it with questions can make your preparation more focused.