Скачать или смотреть Class 11 Biology New Book 2025 | Normal Flora Lecture 2.7 | Benefits, Types & Role in Immunity

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Class 11 Biology New Book 2025 | Normal Flora lecture 2.7 | Benefits, Types & Role in Immunity
✨ Key Topics:
• Normal Flora 1st Year Biology
• Class 11 Biology Chapter 2.7
• New Book 2025 Punjab Board
• Benefits of Normal Flora
• Mutualistic Association
• Vitamin K and B12 synthesis
• Prevent pathogen colonization
• Stimulate cross-reactive antibodies

🎥 Welcome to Lecture 2.7 of Chapter 2 (Bacteria and Viruses/Microorganisms) from the Class 11 Biology New Book 2025 (PCTB)! In this video, we dive deep into Normal Flora—the microbial community found on human surface tissues. Learn about its composition (mostly Bacteria, with some fungi, protists, and archaea) and its key role as a Mutualistic Association. We explain the four major benefits, including the synthesis of essential Vitamin K and B12 by enteric bacteria, competition that prevents pathogen colonization, inhibition of harmful bacteria, and stimulation of cross-reactive antibodies for immunity. This lecture is crucial for FSc 1st Year and competitive exam preparation.

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