Question

Most appropriate term for the life cycle of obelia is
A. Alternation of generations
B. metagenesis
C. metamorphosis
D. neoteny

Answer 1

Hint: Really Obelia is a classic example of alternation of generations in a hydrozoan life cycle, or so they occur suddenly. The eggs and sperm are produced by medusa. An egg develops into a fairly simple non-feeding planula larva after fertilization, which particularly is completely different. The planktonic planula metamorphoses into a benthic polyp, which buds off kind of further polyps and forms a colon in a large form.

Complete answer:
The life cycle of Obelia particularly is termed as Metagenesis which also basically means the alternation of generations and an actual alternation of sexual and of asexual stages, which is different. This is so because of their purposes that is an alternation between the polyploidy and the medusoid generation, quite opposite to nature. The generally fairly colonial marine hydrozoan Obelia exhibits metagenesis wherein very pretty asexual reproduction in polyp through budding particularly particularly produce free-swimming medusa that in virtual mostly turn reproduce sexually by gametic fusion, which essentially mostly is fairly significant, which particularly is fairly significant. The zygote develops into a planula larva which particularly turns into a polyp followed by colony formation, which essentially is quite significant. Neoteny refers to retention of larval features in adults while metamorphosis for the most part is the transition of developmental stages; from larva to adult, demonstrating how the life cycle of Obelia essentially for the most part is generally termed as Metagenesis which also for all intents and purposes basically means alternation of generations and an alternation of sexual and pretty fairly asexual stages in a very really big way in a definitely major way.

Hence the correct answer is option B. The most appropriate term for the life cycle of obelia is metagenesis.

Note: Two forms take place during the life cycle of Obelia. Polyp and medusa are the two forms. The two forms are diploblastic having two tissue layers, those layers are:
> An epidermis and also known as ectodermal.
> A gastrodermis which is also called as endodermis.