Strobilation - types of asexual reproduction, Biology

Strobilation - Types of Asexual Reproduction

Strobilation is a type of asexual reproduction in which successive segments are separated off from the body one after other. It is well demonstrated in some jellyfishes (Scyphozoa) and in tapeworms. In the life-history of Aurelia, a scyphozoan, the planula larva develops into a hydra-like stage termed as hydra tuba or scyphistoma. From the stolon, the scyphistomae may generate new scyphistoma. After a certain period of life this scyphistoma undergoes transverse division producing buds of medusae. This provides it a kind of pattern of a pile of saucers arranged one above the other. In this pile, the youngest (smallest) saucer lies towards the base and the oldest and the largest one at the free end. This "pile of saucers" stage is called the strobila. The transverse discs or young medusae - buds separate one after other from the strobila, each resultant in a kind of larva (called ephyra) which gradually metamorphoses to turns the adult Aurelia. A situation somewhat identical to the above also occurs in the tapeworms. New segments (proglottides) are continuously demarcated off from the neck by a sort of transverse fission; here also, it is the oldest proglottid at the free end that breaks off and the process keeps on repeating.

Posted Date: 2/5/2013 12:20:53 AM | Location : United States







Related Discussions:- Strobilation - types of asexual reproduction, Assignment Help, Ask Question on Strobilation - types of asexual reproduction, Get Answer, Expert's Help, Strobilation - types of asexual reproduction Discussions

Write discussion on Strobilation - types of asexual reproduction
Your posts are moderated
Related Questions

Describe about Results of Total Anomalous pulmonary Venous Connection ? Reported hospital mortality varies from 2 to 20 per cent depending on the experience of cardiac surgery

The protein truncation test (ptt) gives an uncommon exception, targeting mutations that create shortened proteins, majorly premature translation termination. Ptt has various attrac

The arterial supply is  by the right and left coronary arteries. In the event of sudden block of one artery the area of myocardium supplied by that artery undergoes infarction.

Q. Signs and Symptoms diabetic ketoacidosis? The following are the signs and symptoms of DKA: 1) Increased heart rate (tachycardia) 2) Low blood pressure 3) Dehydratio

The cytoskeleton is a network of very little tubules and filaments spread throughout the cytoplasm of eukaryotic cells. It is made of microtubules, microfilaments and intermediate

Mr. Smith read that cholesterol was bad for his health so he eliminated all foods and food products containing this molecule. He later found that his cholesterol level dropped only

How does the photoperiodism affect the flowering of some plants? Flowering is a typical and simple to observe instance of photoperiodism. Most flowering plants flower only duri

Soybean protein isolates:  Soy protein isolates are the most pure and refined soy protein available.  Isolated soybean proteins (ISP), or  soybean protein isolates, are the mos

Q. Evolutionarily protochordates may be intermediate animals between invertebrates and vertebrates. Imagine a scientist is testing the hypothesis that vertebrates evolved from echi