Grade 12 Unit-2 | Archaea Note

📚 Biology Grade 12 – Unit 2: Microorganisms | Archaea Notes A clear and organized study note covering the major concepts of Archaea and microorganisms from Grade 12 Biology. 📖 Topics Covered * Definition and general characteristics of Archaea, including prokaryotic structure, lack of true peptidoglycan cell walls, and ether lipid plasma membranes. * Distinguishing features compared to bacteria, such as initial amino acid usage (methionine) and unique rRNA sequences. * Major physiological groups of Archaea: methanogens, extreme halophiles, and extreme thermophiles/hyperthermophiles. * Environmental adaptation classifications including psychrophiles, cryophiles, and acidophiles. * Beneficial aspects and commercial uses of archaeal enzymes, including detergent additives, bioremediation, and PCR applications. * Physical factors affecting microbial growth, such as temperature, pH, pressure, solutes, and water activity. 🧠 Also includes: learning objectives, self-questioning review sections, and visual illustrations of archaeal cell structure and phylogenetic diversity. 🎯 Useful for: Grade 12 Biology students, revision, class preparation, and exam study. 📄 Format: PDF 📚 Subject: Biology 🎓 Level: Grade 12 🦠 Unit: Microorganisms