Class 11 Biology - Chapter 1: The Living World
Detailed NEET Based Notes + 30 MCQs
1. Characteristics of Living Organisms
• Growth – Increase in mass and number of individuals (intrinsic in living organisms).
• Reproduction – Sexual and asexual methods; not defining feature (mules, infertile workers).
• Metabolism – Sum total of all biochemical reactions; DEFINING FEATURE of life.
• Cellular Organisation – All living organisms are made of cells.
• Consciousness – Ability to sense and respond to stimuli.
2. Diversity & Need for Classification
• About 1.7–1.8 million species identified worldwide.
• India is one of the 12 mega biodiversity countries.
• Classification helps in easy identification and study.
3. Taxonomy & Systematics
• Taxonomy – Identification, nomenclature and classification.
• Systematics – Study of diversity + evolutionary relationships.
• Father of Taxonomy – Carolus Linnaeus.
4. Binomial Nomenclature Rules
• Given by Linnaeus.
• Two words – Genus (capital) + species (small).
• Printed in italics or underlined separately if handwritten.
• Example: Homo sapiens.
5. Taxonomic Hierarchy
• Species → Genus → Family → Order → Class → Phylum/Division → Kingdom.
• Species is basic unit of classification.
, 6. Taxonomical Aids
• Herbarium – Dried plant specimens on sheets.
• Botanical Gardens – Living plant collections.
• Museums – Preserved specimens.
• Zoological Parks – Live animals.
• Key – Identification tool based on contrasting characters.
NEET HIGH YIELD POINTS (20% → 80% Concept)
• Metabolism is defining feature of life.
• Species is basic unit.
• Correct scientific name format rules.
• Difference between Taxonomy & Systematics.
• Functions of taxonomical aids.
Detailed NEET Based Notes + 30 MCQs
1. Characteristics of Living Organisms
• Growth – Increase in mass and number of individuals (intrinsic in living organisms).
• Reproduction – Sexual and asexual methods; not defining feature (mules, infertile workers).
• Metabolism – Sum total of all biochemical reactions; DEFINING FEATURE of life.
• Cellular Organisation – All living organisms are made of cells.
• Consciousness – Ability to sense and respond to stimuli.
2. Diversity & Need for Classification
• About 1.7–1.8 million species identified worldwide.
• India is one of the 12 mega biodiversity countries.
• Classification helps in easy identification and study.
3. Taxonomy & Systematics
• Taxonomy – Identification, nomenclature and classification.
• Systematics – Study of diversity + evolutionary relationships.
• Father of Taxonomy – Carolus Linnaeus.
4. Binomial Nomenclature Rules
• Given by Linnaeus.
• Two words – Genus (capital) + species (small).
• Printed in italics or underlined separately if handwritten.
• Example: Homo sapiens.
5. Taxonomic Hierarchy
• Species → Genus → Family → Order → Class → Phylum/Division → Kingdom.
• Species is basic unit of classification.
, 6. Taxonomical Aids
• Herbarium – Dried plant specimens on sheets.
• Botanical Gardens – Living plant collections.
• Museums – Preserved specimens.
• Zoological Parks – Live animals.
• Key – Identification tool based on contrasting characters.
NEET HIGH YIELD POINTS (20% → 80% Concept)
• Metabolism is defining feature of life.
• Species is basic unit.
• Correct scientific name format rules.
• Difference between Taxonomy & Systematics.
• Functions of taxonomical aids.
