The Living WorldNEET Botany · Class 11 · NCERT Chapter 1

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• Hover over each characteristic tile to see the explanation for that organism.
• Metabolism is the ONLY characteristic present in ALL living organisms without exception.
• Crystals grow by accretion (adding material on outside), NOT by intrinsic (internal) growth like cells.
• Viruses are acellular: they have no cells, so they are not placed in any of the five kingdoms.

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• Metabolism is the one feature ALL living organisms share. When in doubt, ask: does it have independent metabolism?
• Fire, crystals and robots might seem "alive" because they move or change, but they lack cellular metabolism.
• Dormant seeds and sterile animals (mules, worker bees) are living even though they look inactive or cannot reproduce.
• Viruses blur the boundary: they have genes and evolve, but are acellular and have no independent metabolism.

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• King Philip Came Over For Good Soup: Kingdom, Phylum, Class, Order, Family, Genus, Species.
• Species is the LOWEST (most specific) rank. Kingdom is the HIGHEST (most general).
• In plants, Phylum is replaced by Division, but the level is the same.
• Each higher rank contains more organisms with broader shared features.

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• In plant taxonomy, Phylum is called Division. Both represent the same hierarchical level.
• All organisms with the same Genus are more closely related than those only sharing the same Family.
• The species name is always written in full (Genus + epithet) when first used in a text.
• Compare Lion and Human: they share Kingdom, Phylum, and Class, but diverge at Order.

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• The genus name always starts with a capital letter. The species epithet is always fully lowercase.
• When handwriting, underline each part separately instead of using italics.
• Many species epithets are descriptive: indica = from India, sativa = cultivated, domestica = of the house.
• ICBN governs plant names; ICZN governs animal names. Both use the same binomial format.

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• Key difference: herbarium and museum have DEAD specimens; botanical garden and zoo have LIVING organisms.
• Flora and Monograph are publications (books/papers), not physical collections.
• A key is an identification TOOL, not a collection or publication.
• Monograph vs Flora: monograph covers ONE taxon worldwide; Flora covers ALL taxa in ONE region.

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• Viruses are NOT in any kingdom: they are acellular and not considered fully living.
• Fungi have chitin cell walls (same material as insect exoskeletons), not cellulose like plants.
• Euglena is a trick question: it is a unicellular eukaryote placed in Protista, even though it can photosynthesize.
• All prokaryotes (bacteria, cyanobacteria) belong to Monera. No membrane-bound nucleus.

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• The trickiest is Euglena: it is in Protista, not Plantae, even though it can photosynthesize.
• Any organism with chitin in its cell wall is a Fungus (never a plant).
• Any prokaryote (no nuclear membrane) is in Monera.
• Viruses do not appear as an option because they are not in any kingdom.