Domain classification system class 9 chapter 2

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Is lengthy video mein Class 9 Biology Chapter 2 ka bohat important topic Domain Classification System detail se explain kiya gaya hai – modern classification ka sab se upar ka level!
Complete Domain Explanation:
Domain kya hai? (Highest taxonomic rank – sab se bada group)
Three Domains (1977 mein Carl Woese ne propose kiye):
Domain Archaea
Prokaryotic (no true nucleus)
Extreme environments mein rehte hain (hot springs, salty lakes, deep sea vents)
Cell wall mein pseudopeptidoglycan hota hai
Examples: Methanogens, Halophiles, Thermophiles
Important: Earth's early life forms se related
Domain Bacteria
Prokaryotic (no nucleus)
Normal aur pathogenic bacteria (good aur bad dono)
Cell wall mein peptidoglycan hota hai
Examples: E. coli, Streptococcus, Lactobacillus
Important: Nitrogen fixation, decomposition, human gut bacteria
Domain Eukarya
Eukaryotic (true nucleus aur membrane-bound organelles)
Complex cells – plants, animals, fungi, protists
Examples: Humans, plants, mushrooms, amoeba
Subdivided into Four Kingdoms: Protista, Fungi, Plantae, Animalia
Yeh topic board exams mein bar bar aata hai – short questions, long questions aur MCQs ke liye must-watch! Students ko modern classification ka complete base clear ho jayega Inshallah.
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