Cnidaria - protozoa, Biology

Assignment Help:

Cnidaria - Protozoa

The mature medusoid jellyfishes like Aurelia are the sexual stages. Sperms and eggs produced in the dissimilar (male and female) individuals ale released in water, which then fuse to form a zygote. The latter develops into a fixed polyploids scyphistoma that undergoes various transverse fission to produce ephyras by the process called Strobilation (see page lo), a type of asexual reproduction. Thus the sexual generation of the adult jellyfish is alternated along with an asexual generation i.e., scyphistoma. You would recall the alternation of generation is quite common among hydrozoans, in which the highly branching sedentary colonies such as those of Obelia are asexual generations. They give off medusae which are sexual generations. The medusae give rise to the colonies and vice versa, alternating with one another.


Related Discussions:- Cnidaria - protozoa

What is nuclear pollution, What is nuclear pollution? Nuclear pollution...

What is nuclear pollution? Nuclear pollution having of radiations emitted from atomic nuclei, these radiations is highly injurious to living beings. They can be originated from

Excretory system, name of the excretory organ of a lizard

name of the excretory organ of a lizard

Adverse effects of noise pollution, 1.      Effect on general health:  ...

1.      Effect on general health:          Noise pollution increases the rate of heart beat, constriction of blood vessels and blood pressure. Noise also causes anxiety, stres

State about the halsted reitan battery, State about the Halsted Reitan batt...

State about the Halsted Reitan battery The Halsted Reitan battery, as the procedure came to be known over the years, also has a history. It has been described as a fixed batter

Describe dextran , Dextran is a glucose polymer where the glucose re...

Dextran is a glucose polymer where the glucose residues are mainly related by α1-6 bonds. Moreover, a few branches also happen. These are classically formed by α1-2, α1-3 or α1-4 b

Explain adefovir dipivoxil, Adefovir dipivoxil (Hepsera)  This phosphon...

Adefovir dipivoxil (Hepsera)  This phosphonate nucleoside analog, administered as the oral prodrug, inhibits replication of HBV, including variants resistant to lamivudine. Ade

Influence of yolk on cleavage, Influence of Yolk on Cleavage Though b...

Influence of Yolk on Cleavage Though biological significance of yolk is to provide nourishment to the developing embryo, it is not part of the active cytoplasm. Yolk is dead

Into which classes are mollusc divided, Q Into which classes are mollusc di...

Q Into which classes are mollusc divided? What are some representing beings of each class? The phylum Mollusca is divided into five main classes: pelecypods, or bivalves (Pelec

Explain causes of shigellosis, Q. Explain causes of Shigellosis? Shigel...

Q. Explain causes of Shigellosis? Shigellosis is caused by the genus Shigella and is a common enteric (intestinal) infection. The genus has four serological groups,

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd