Question

division of labour by different type of zooids in obelia
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Answer 1

All other types of zooids are modifications of these two types of zooids. ... In Physalia, zooids are in units called cormidia, which bear gastrozooids, small ... one of division of labour in which specific functions are assigned to different individuals.

Answer 2

The division of labor by different type of zooids in obelia are as follows:

• Obelia shows three distinct forms in the case of colony formation, thus known as trimorphic.
• Different zooids are "Polyps or hydranths (nutritive zooids); Gonangia or blastostyles (budding zooids); Medusae, (sexual zooids)."
• Gastrozooids or trophozooid capture, ingest and digest food. Hydranths look similar to that of a hydra.
• Gonangium forms by Gonotheca, blastostyle, and the gonophores
• The gonads mature after the medusae escape from the gonotheca.
• "Male and female gametes → zygote → planula larva → hydrula → colony → sexual medusae → gametes → zygote and so on."

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