What is the chief difference between the hydrozoans and the rest of the cnidarians regarding the germinal layer(s) in which its 'defensive structures or cells of defence' occur?
Answers
These features distinguish hydrozoans from other cnidarians regarding germinal layers:
• Nematocysts are only in the epidermis
• Gametes are epidermal and released to the outside of the body rather than into the gastrovascular cavity
• And Mesoglea is largely a cellular.
• Medusa projects inward to form a Shellie lip, called the vellum. A vellum is present on most hydrozoan medusae but is absent in all other cnidarian classes.
Answer:
These features distinguish hydrozoans from other cnidarians regarding germinal layers:
• Nematocysts are only in the epidermis
• Gametes are epidermal and released to the outside of the body rather than into the gastrovascular cavity
• And Mesoglea is largely a cellular.
• Medusa projects inward to form a Shellie lip, called the vellum. A vellum is present on most hydrozoan medusae but is absent in all other cnidarian classes.
Explanation: