Biology Chapter 1 Cell YouTube Lecture Handouts for Competitive Exams

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Classifying Life - Remember 6 Layers of Taxonomy with Simple Mnemonic
  • Properties of life
  • Properties of life
  • Diversity in living world and their classification
  • Rules for nomenclature
  • Taxonomic categories
  • Tools for the study taxonomy

What is Life?

Living Things

Non-living Things

Properties of Life

Properties of Life Image-1
Properties of Life Image-2

Diversity in the Living World

  1. Systematics
  2. Taxonomy
  3. Classification
  4. Nomenclature and identification

General Rules for Nomenclature

  • In Latin & italics

Homo sapiens

(Genus) (Species)

  • Handwritten - underlined
  • First term- Capital letter
  • Second term – small letter

Taxonomic Categories

Taxonomic Categories Image


Taxonomic Categories Image Examplenation

Tools to Study Taxonomy

  • Herbarium
  • Botanical gardens
  • Museum
  • Zoological Parks
  • Wild life sanctuaries
  • National parks
  • Biosphere reserve
  • Key

Why is Taxonomy Useful?

- Prevent confusion among scientists

- Show how organisms are related

- Used to reconstruct phylogenies