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What structures determine whether a polyp of obelia is a hydranth or a gonangium?
Wiki User
∙ 11y ago
A hydranth (feeding polyp) will have a hypostome, mouth and tentacles. A gonangium (reproductive polyp) will have medusa buds and gonotheca. The medusa buds will become free swimming Medusa to sexually reproduce by the female releasing an egg and the male releasing haploid sperm. After fertilization, the zygote develops into a ciliated, swimming planula larva which will settle to the ocean floor attaching itself to the substrate. A new generation of polyps then begins to form through asexual budding.
Wiki User
∙ 11y ago
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