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Understanding Invertebrate Life Cycles: Medusae and Polyps

Explore the fascinating life cycles of medusae and polyps, from their growth and development to the release of gametes and zygote formation. Delve into the stages of planula development leading to the formation of either polyp or medusa forms.

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Understanding Invertebrate Life Cycles: Medusae and Polyps

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Presentation Transcript

  1. Lecture 5Animal Evolution – The Invertebrates

  2. Their Life Cycle • Medusae & polyps-grow & develop during their lifecycles. • Medusae; sexual stage • Embedded in the medusa’s epithelium are gonads; primary reproductive organs. • Gonads release gametes; sperm & ovum-zygote. • Zygote develop into planulas which forms polyp/medusa

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