Complete NEET prep for Biological Classification: NCERT-aligned notes, 30+ PYQs with solutions, and 8 interactive widgets on five kingdoms, Monera, Protista, Fungi, viruses, viroids and lichens. Built for NEET 2027.
Chapter Notes
Complete NCERT-aligned notes with KaTeX equations, worked NEET problems and inline interactive widgets.
NEET Questions
30+ NEET previous year questions with full step-by-step solutions, grouped by topic.
Interactive Learning
Live calculators for vernier, screw gauge, error propagation, dimensional analysis and more.
Why we need biological classification and the history from Aristotle to Whittaker
Features of all five kingdoms: Monera, Protista, Fungi, Plantae, Animalia
Kingdom Monera: archaebacteria, eubacteria, cyanobacteria, mycoplasma with examples
Kingdom Protista: five groups including chrysophytes, dinoflagellates, euglenoids, slime moulds, protozoans
Four classes of Fungi with identifying features and NEET examples
Viruses, viroids, prions: key differences and NEET-important facts
Lichens as symbiotic associations: role in ecological succession
Worked NEET problems on every topic
22 questions from Biological Classification across the last 5 NEET papers.
NEET 2024
3
questions
NEET 2023
4
questions
NEET 2022
4
questions
NEET 2021
5
questions
NEET 2020
6
questions
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You can expect 1 to 3 questions from Biological Classification in NEET 2027. This chapter has medium PYQ frequency (about 5 out of 10 years it appears). The most tested topics are: which class of Fungi an example organism belongs to, features of Kingdom Monera vs Protista, and facts about viruses, viroids, and lichens.
R.H. Whittaker (1969) based his five-kingdom classification on: (1) cell structure (prokaryote vs eukaryote), (2) body organisation (unicellular vs multicellular), (3) mode of nutrition (autotrophic, heterotrophic, absorptive), (4) mode of reproduction, and (5) phylogenetic relationships (evolutionary history).
Archaebacteria are ancient bacteria that live in extreme environments (hot springs, salt lakes, swamps). They have unique lipids in their cell membrane that let them survive harsh conditions. Eubacteria are true bacteria with a more typical cell wall (peptidoglycan). Examples of archaebacteria: thermoacidophiles, halophiles, methanogens. Examples of eubacteria: Lactobacillus, Streptococcus, Nostoc (cyanobacteria).
Penicillium belongs to Ascomycetes (sac fungi). It reproduces asexually by conidia. Other Ascomycetes include Aspergillus, Claviceps (ergot), Neurospora (bread mould used in genetics), and yeast (Saccharomyces). Remember: Ascomycetes produce ascospores in an ascus (sac).
A virus is a nucleoprotein particle with a protein coat (capsid) surrounding a nucleic acid core (DNA or RNA). A viroid is just a small single-stranded RNA molecule with no protein coat at all. Viroids are even simpler than viruses and cause plant diseases (example: potato spindle tuber disease). Prions are different again: they are misfolded proteins with no nucleic acid at all.
Lichens can colonise bare rocks where no other organism can survive. They slowly break down rock surfaces (through acids they secrete) to form a thin layer of soil, making conditions suitable for mosses and other organisms to follow. Because they are the first to colonise barren areas, they are called pioneers or pioneer species in ecological succession.
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