Metagenesis in Obelia Explained | Life Cycle, Alternation of Generations & Polymorphism.

Описание: Welcome back, dear students! In this video, we’ll explore Metagenesis in Obelia, a fascinating example of alternation between asexual and sexual phases in the animal kingdom. You’ll learn about the life cycle of Obelia, including its polypoid (asexual) and medusoid (sexual) generations, and how these stages alternate in a rhythmic pattern.

We’ll also discuss the developmental stages — from zygote to planula larva to colony formation — and the polymorphism seen in Obelia, where different zooids perform specialized roles such as feeding, reproduction, and dispersal.

By the end of this lesson, you’ll clearly understand why Obelia is an excellent example of metagenesis, how it differs from true alternation of generations, and its significance in Hydrozoan evolution.

📚 Topics Covered:
✅ Life cycle of Obelia
✅ Alternation of generations and metagenesis
✅ Developmental stages (zygote, planula, hydrula, colony, medusa)
✅ Polymorphism in Obelia
✅ Difference between alternation of generations and metagenesis

🎓 Perfect for UG, PG, NEET, NET, SLET, and GATE Biology students!

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