Day-12 | पुष्पीय पादपो में लैंगिक जनन | Sharma Sir скачать в хорошем качестве

Day-12 | पुष्पीय पादपो में लैंगिक जनन | Sharma Sir

🧬 *Welcome to Biology World – By Sharma Sir* 🌿 Your one-stop destination for mastering *Class 11 & 12 Biology* and cracking *NEET* with confidence! At *Biology World**, we believe in making complex biological concepts **easy, interesting, and exam-focused**. With years of teaching experience, **Sharma Sir* simplifies every topic—from *NCERT basics* to **advanced NEET-level questions**—to help you build a strong foundation and score top marks. 🎓 What You’ll Learn Here: ✅ Complete Class 11 & 12 Biology Syllabus ✅ NCERT Line-by-Line Explanation ✅ NEET-focused Concepts & PYQs ✅ Tips, Tricks & Mnemonics ✅ Chapter-wise MCQs and Test Series ✅ Doubt Clearing and Concept Building Sessions Got it 👍 You’re asking for *all the topics* that come under **“Sexual Reproduction in Flowering Plants” (Class 12 Biology – NCERT)**. Here’s the **complete, exam-oriented breakdown**, neatly organized so you don’t miss anything: --- 🌸 Chapter: Sexual Reproduction in Flowering Plants (Class 12) 1️⃣ Flower – Structure & Function Flower as the reproductive organ Parts of a typical flower *Calyx (sepals)* *Corolla (petals)* *Androecium (stamens)* *Gynoecium (pistil/carpel)* Types of flowers: Bisexual and unisexual Complete and incomplete --- 2️⃣ Pre-Fertilisation: Structures & Events #### A. *Androecium (Male Reproductive Part)* Structure of stamen: Anther Filament **Microsporangium**: Structure of anther Wall layers: Epidermis Endothecium Middle layers Tapetum *Microsporogenesis* Formation of pollen grains Structure of *pollen grain* Pollen viability Role of pollen grains #### B. *Gynoecium (Female Reproductive Part)* Structure of pistil: Stigma Style Ovary Structure of *ovule* Integuments Nucellus Embryo sac Types of ovules (marginal, axile, parietal, etc.) *Megasporogenesis* *Megagametogenesis* Structure of *embryo sac* (7-celled, 8-nucleate) --- 3️⃣ Pollination Definition of pollination **Types of pollination**: Autogamy Geitonogamy Xenogamy **Agents of pollination**: Wind (Anemophily) Water (Hydrophily) Insects (Entomophily) Birds, bats, etc. Outbreeding devices Pollen–pistil interaction --- 4️⃣ Fertilisation Germination of pollen grain on stigma Growth of pollen tube Entry of pollen tube into ovule *Double fertilisation* (important!) Syngamy Triple fusion Significance of double fertilisation --- 5️⃣ Post-Fertilisation: Structures & Events #### A. *Endosperm* Development of endosperm Types of endosperm: Nuclear Cellular Helobial Functions of endosperm #### B. *Embryo* Development of embryo (embryogenesis) Structure of dicot embryo Structure of monocot embryo #### C. *Seed* Structure of seed Types of seeds: Albuminous Non-albuminous Seed coat Seed dormancy Seed germination #### D. *Fruit* Development of fruit Types of fruits: True fruit False fruit Parthenocarpy --- 6️⃣ Special Modes of Reproduction *Apomixis* *Polyembryony* Significance in plant breeding --- ⭐ Important Exam Focus Diagrams: L.S. of flower T.S. of anther Ovule Embryo sac Pollen grain Definitions (very common in exams) Differences: Autogamy vs Xenogamy Microsporogenesis vs Megasporogenesis NCERT examples (super important) Whether you’re preparing for *CBSE Boards* or aiming for a **perfect 360 in NEET**, Biology World is here to guide you every step of the way. 📌 *Subscribe now* and turn on the bell icon 🔔 to never miss a life-changing lecture!