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
Explain mixture in basic chemistry? Mixtures :  Mixtures are produced by combining two or more substances. In contrast to the substances in compounds, the substances that com

Q. Why is AIDS difficult to prevent by vaccination? It is not easy to produce a vaccine against AIDS because the HIV is a highly mutant virus. In approximately every replicatio

Temperature - Estuaries Another important variable is temperature. The temperature of estuary keeps on fluctuating it heats up and cools down more rapidly under prevailin

What is the prevailing wind direction in equatorial regions affected by the trade winds? a) The wind blows from east to west b) the wind blows from west to east.

About 90% of ozone of atmosphere resides in stratosphere (16 to 40 km) layer of atmosphere as ozone layer. It protects life on this planet from harmful U.V. radiations. In absence

Flighting adaptations in birds

Conventional amphotericin Amphotericin B deoxycholate (Fungizone, and others), the old non-lipid formulation of amphotericin, is by far the least expensive, but the developmen

Captive Breeding - Measures for Species Conservation Species which are reduced to dangerous levels need more intensive management, and one strategy is their captive breeding.

Define Diet for Treatment for Protein Energy Malnutrition? Treatment of cases of kwashiorkor or marasmus involves mainly providing appropriate nutrition support. The child shou

Ask question #Mcharacteristics of xerophytesinimum 100 words accepted#