Cnidaria - protozoa, Biology

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.

Posted Date: 2/5/2013 1:44:32 AM | Location : United States







Related Discussions:- Cnidaria - protozoa, Assignment Help, Ask Question on Cnidaria - protozoa, Get Answer, Expert's Help, Cnidaria - protozoa Discussions

Write discussion on Cnidaria - protozoa
Your posts are moderated
Related Questions
How did muir's impression of man's relationship with nature differ from Susan Fenimore coopers? And How did Gifford Pinchot view nature?

THEO R Y OF PANGENESIS - To make up the weakness of inheritance Darwin in this theory assumed the existence of Pangenes (gem mules) as small units (representives) of each par

Explain the term osmosis

Q. Foods for phenylketonuria patient? The majority of foods for a PKU patient should come from the bottom half of the pyramid. As you may have observed, this contains the pheny

Describe about Transposition of great arteries with large ventricular septal defect ? Transposition of great arteries with large ventricular septal defect: Usually the intercir


Soy Protein Concentrates The Association of American Feed Control Officials, Inc. (AAFCO) specifies soy protein concentrates as follows:  "Soy Protein Concentrate is organiz

explain polymorphism in lysosomes

Which of the following pairs of functional groups CANNOT react with each other by a dehydration reaction? Select one: a. Carboxyl;Hydroxyl b. Carboxyl;Sulfhydryl c. Pho

Explain Water - An Essential but Overlooked Nutrient? You may already know that the total body water (TBW) constitutes 50-60% of the body weight. A 70 kg 'standard male' contai