The Living World — Class 11 CBSE Biology revision notes
A 4-page visual revision sheet for The Living World, written for Class 11 CBSE Biology. Formulas, diagrams and the traps that cost marks, laid out to be read the night before rather than the term before. Free, and it opens inside CapCompass.
Page 1 as PDF
The Living World in one look
what counts as alive, and the ladder built to name every kind of it
Five hallmarks of life
- Growth: increase in cell number and mass, from within
- Reproduction: makes new individuals of the same kind
- Metabolism: the sum of every chemical reaction inside the body
- Cellular organisation: built of one cell or many, always cells
- Consciousness: sensing the surroundings and responding to them
Growth: living vs non-living
- growth is intrinsic, cells divide and add mass from within
- indeterminate, continues through much of the life span in plants
- growth is extrinsic, material is deposited layer on the outside
- stops the moment fresh material stops arriving
Reproduction isn't universal
- defined as producing progeny, similar to the parent, by sexual or asexual means
- worker bees, worker ants, mules and many sterile hybrids never reproduce at all, yet they are still alive
- a single individual can live out its entire life without ever reproducing once
- so reproduction alone can never be the complete test for life
Metabolism, unique but not sufficient alone
- catabolic reactions break molecules down and release energy, anabolic reactions build them up and use it
- every living cell performs metabolism as an organised, coordinated whole, no exceptions
- but isolated cell-free extracts can carry out the same biochemical reactions in a test tube
- that in-vitro reaction is metabolism without a cell around it, so metabolism by itself isn't proof of life either
Page 1 of 4. The full sheet, all 4 pages, opens free in the app.
What this The Living World sheet covers
- Five hallmarks of life
- Growth
- Reproduction
- Metabolism
- Cellular organisation
- Consciousness
- Growth: living vs non-living
- Living organism
- Crystal, mountain, non-living
- Reproduction isn't universal
- Metabolism, unique but not sufficient alone
- Biodiversity and why classification exists
- Taxonomic categories, broadest to narrowest
- Kingdom
- Phylum / Division
- Class
- Order
- Family
- Genus
- Species
- Housefly, through every rank
- Phylum
- Binomial nomenclature rules
- Species, the base unit
- Taxonomy vs Systematics
- Taxonomy
- Systematics
- Taxonomic aids
- Herbarium
- Botanical garden
- Museum
- Zoological park
- Taxonomic key
- Taxonomic key, the tool that identifies
- Same genus, different question
- Traps that cost marks
- Tricks that save time
How CapCompass uses this sheet
These notes are not a standalone PDF. CapCompass plans Biology chapter by chapter against your real exam dates and free hours, and when the plan reaches The Living World the sheet opens inside the study block itself — at the page covering the sub-topic that block is on, with the timer still running. Revision arrives at the moment the plan says revise, instead of having to be gone looking for.
More Biology Class 11 revision notes
- Anatomy of Flowering Plants
- Animal Kingdom
- Biological Classification
- Biomolecules
- Body Fluids and Circulation
- Breathing and Exchange of Gases
- Cell Cycle and Cell Division
- Cell: The Unit of Life
- Chemical Coordination and Integration
- Excretory Products and their Elimination
- Locomotion and Movement
- Morphology of Flowering Plants
- Neural Control and Coordination
- Photosynthesis in Higher Plants
- Plant Growth and Development
- Plant Kingdom
- Respiration in Plants
- Structural Organisation in Animals