Bio3400Sect5SP18KONECNY instructions I hel ans/Radiate Animals) Save & Exit Subm

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Bio3400Sect5SP18KONECNY instructions I hel ans/Radiate Animals) Save & Exit Submit Question 12 (of 23) alue: .34 points How does Hydra reproduce sexually? O Separate male polyps and female polyps produce sperm and eggs, respectively, that fuse and grow into a medusa O The swimming medusa stages are male and female and the fertilized eggs develop into planua larvae that become Hydra polyps O The polyp body wall can produce both ovaries and testes that make eggs and sperm O Hydra sperm fertilize an egg in the body wall and this starts the growth of a bud O Hydra do not reproduce sexually since they lost the sexual medusa stage esc G Search or type URL

Explanation / Answer

C. The polyp body can produce both ovaries and testies that make eggs and sperms respectively.

This occurs when conditions are unfavourable. The testis release the sperm that swims and fertilizes the egg in the ovary. Upon death of the adult these fertilized eggs, which are now coated with a strong substance for protection, settle down to the ground and develop into an adult when conditions become favourable again. Some species are hermaphrodites as well.

Polyp and medusa are two different forms of the adult hydra. The former being sessile while the latter is motile. The process is called alternation of generation which is different from reproduction.

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