Class 11th 👨‍⚕Biology Lecture 2📖 The living world by Navjot Dhingra

Consciousness (Defining): The ability to sense the environment and respond to external stimuli (physical, chemical, or biological) is the most defining feature of living organisms. Biodiversity and Taxonomy Biodiversity: The Earth supports an incredible diversity of life, with an estimated 1.7 to 1.8 million species already identified and described. Taxonomy: The branch of biology that groups and categorizes organisms based on their observable characteristics. The core processes include characterization, identification, classification, and nomenclature. Binomial Nomenclature Developed by Carl Linnaeus, this system provides a standardized, two-word scientific name to every organism Generic Name: The first word denotes the Genus (capitalized). Specific Epithet: The second word denotes the Species (lowercase). Rules of Writing: Printed names must be in italics. Handwritten names must be underlined separately to indicate their Latin origin. Taxonomic Categories Classification follows a strict, hierarchical rank from the broadest grouping (Kingdom) down to the specific organism (Species) Domain / Kingdom: The highest rank (e.g., Animalia or Plantae) Phylum / Division Class Order Family Genus Species: The lowest, most specific taxonomic rank.