8 interactive concept widgets for Biological Classification. Drag any slider, change any number, and watch the formula and the answer update live. Built so you understand how each NEET problem actually works, not just the final number.
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Compare all five kingdoms side by side on cell type, body organisation, cell wall, and nutrition.
Click a kingdom to highlight and compare its features across cell type, body organisation, cell wall, nutrition and examples.
Click a kingdom name to highlight its column. Compare cell type, body organisation, cell wall, nutrition mode and examples across all five kingdoms.
Monera
Protista
Fungi
Plantae
Animalia
Cell type
Prokaryote
Eukaryote
Eukaryote
Eukaryote
Eukaryote
Body organisation
Unicellular
Unicellular
Multicellular (except yeast)
Multicellular
Multicellular
Cell wall
Present (peptidoglycan or unique lipids)
Present in some (silica in diatoms) or absent
Present (chitin)
Present (cellulose)
Absent
Nutrition mode
Autotrophic or heterotrophic (most diverse)
Autotrophic or heterotrophic
Heterotrophic (saprophytic or parasitic)
Autotrophic (photosynthesis)
Heterotrophic (holozoic ingestion)
Key examples
Bacteria, cyanobacteria, mycoplasma
Amoeba, Euglena, Paramecium, diatoms
Mushroom, Penicillium, Rhizopus, yeast
Mango, rice, fern, moss
Lion, frog, earthworm, human
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Read the clue and pick the correct kingdom. Tests all five kingdoms with NEET-level traps.
Q 1 of 12
Score: 0/12
Clue
Prokaryote, fixes nitrogen, found in water bodies and rice fields.
Monera
Protista
Fungi
Plantae
Animalia
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Archaebacteria, eubacteria, cyanobacteria, and mycoplasma with features, examples, and NEET tips.
Explore the four major groups of Kingdom Monera with features, examples and NEET traps.
Explore the four major groups within Kingdom Monera. Click each group to see its definition, key features, examples and NEET trap.
Archaebacteria
Definition
Ancient bacteria found in extreme environments. Oldest known organisms.
Key feature
Unique branched chain lipids in cell membrane (different from all other organisms).
Examples
NEET tip
Methanogens are archaebacteria found in swamps and cattle gut. They are the source of biogas (marsh gas = methane CH4).
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Explore the four bacterial shapes, see NEET-important examples, and quiz yourself on which organism has which shape.
Bacteria come in four main shapes. Click a shape to explore it, or switch to quiz mode to test yourself.
Coccus
Bacillus
Vibrio
Spirillum
Click a shape above to see its details and examples.
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Chrysophytes, dinoflagellates, euglenoids, slime moulds, and protozoans with NEET traps.
Explore all five groups of Kingdom Protista with key features, special characteristics, examples and common NEET traps.
Kingdom Protista has five major groups, each with unique features. Click a group to explore its characteristics, examples and common NEET traps.
Chrysophytes
Key features
Special characteristic
Diatomaceous earth: used in filtration of oils and syrups, and as a gentle abrasive in toothpaste.
Examples
Diatoms (major producers in oceans), golden algae
NEET trap
Diatoms are in Chrysophytes, NOT Dinoflagellates. Their cell wall material is silica (SiO2), not chitin or cellulose.
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Phycomycetes, Ascomycetes, Basidiomycetes, Deuteromycetes with spore types and organism sorter.
Explore all four fungal classes with hyphae types, spore types and key examples, then quiz yourself on organism classification.
Explore the four classes of Kingdom Fungi and test yourself on which organism belongs to which class.
Phycomycetes
Hyphae type:
Aseptate (coenocytic): no cross-walls, multinucleate
Asexual spore:
Zoospores (motile) or aplanospores (non-motile)
Sexual spore:
Zygospores
Sexual structure:
Zygosporangium
Examples
NEET key
Only class with ASEPTATE hyphae. Sexual spore = ZYGOSPORE.
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Compare three acellular agents and explore lichen symbiosis, types, and ecological role.
Explore the three acellular infectious agents, compare their composition, discoverers and diseases caused.
Viruses, viroids and prions are not placed in any kingdom. They are acellular infectious agents. Click each panel to explore its composition, discoverer, diseases and NEET key.
Virus
Nucleic acid + protein coat
✓
Nucleic acid
✓
Protein coat
✗
Cells
Viroid
Only naked RNA, no protein coat
✓
Nucleic acid
✗
Protein coat
✗
Cells
Prion
Only misfolded protein, no nucleic acid
✗
Nucleic acid
✓
Protein coat
✗
Cells
Quick comparison table
Virus
Viroid
Prion
Nucleic acid (DNA/RNA)?
Yes
Yes
No
Protein coat?
Yes
No
Yes
Has cells?
No
No
No
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Explore what lichens are, their three growth forms and why they matter ecologically.
Lichens are remarkable composite organisms formed by a fungus and an alga or cyanobacterium living together. Explore their symbiosis, types and ecological significance.
Lichen = Mycobiont + Phycobiont
Mycobiont (fungal partner)
Usually an Ascomycete (occasionally Basidiomycete). Provides the structural body of the lichen.
Role: physical structure, water and mineral absorption, protection
Phycobiont (algal/cyanobacterial partner)
Green algae (most common) or cyanobacteria (some fix nitrogen too).
Role: photosynthesis, food production for both partners
Mutualism: both partners benefit
The relationship is mutualistic. The fungus gets food (sugars) from the alga. The alga gets water, minerals and protection from the fungal body. Neither can survive well without the other in extreme environments.
NEET trap
Lichen is a fungus plus an alga or cyanobacterium. It is NOT a plant plus a fungus. The fungal partner is usually an Ascomycete, not a Basidiomycete.
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