Question

Explain life cycle of obelia​

Answer 1

Answer:

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Explanation:

Obelia throughout its life cycle takes two forms: polyp and medusa. The first form is diploblastic, two true tissue layers – an epidermis (ectodermis). In contrast, the second form is gastrodermis (endodermis), with a mesoglia which is jelly-like filling the area between the two tissue layers.

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Answer 2

Answer:

The polyp colony facilitates asexual reproduction. During this stage of life, the confinement of obelia is to the substrate surfaces.

There are gastrozooidsthis available on this mature colony. Furthermore, gastrozooidsthis refers to individual hydranths.

The gastrozooidsthis certainly expand and contract so as to facilitate the growth of this organism by feeding. The reproductive polyp gonozooids consist of medusa buds.

Other hydranths have a specialization for defence. Furthermore, the main stalky body of the colony comprises of coenosarc. Moreover, this coenosarc is covered by a protective perisarc.

The next generation of the life cycle begins when the release of medusae takes place from the gonozooids. This results in the production of free-swimming only male medusae velum.

Furthermore, these male medusa velum have gonads, a mouth, and tentacles. The physical appearance of the male and female medusae velum is probably indistinguishable.

Explanation: