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

Explain atrial switch operation, Explain Atrial Switch Operation ? The ...

Explain Atrial Switch Operation ? The hospital mortality reported varies between 0 and 15 per cent. Late survival is worse for TGA with VSD compared to simple TGA. 15 year surv

Explian anthropometric measures, Explian Anthropometric measures Anthr...

Explian Anthropometric measures Anthropometric measures : It measures growth  in  children  and  shows changes  in weight  in  all populations  that  call reflect  diseases an

What are carbohydrates, Q. What are carbohydrates? Carbohydrates are i...

Q. What are carbohydrates? Carbohydrates are important organic compounds widely distributed in animals and plants. Plants can synthesize carbohydrates by the process of photos

Spharosome, what is origin ofspharosome

what is origin ofspharosome

Optic vesicle, Optic vesicle We have explained earlier that the presum...

Optic vesicle We have explained earlier that the presumptive material for the optic vesicles lies in qe eye field in the anterior region of the early neural plate. Experiments

Rinderpest, R in d e rp es t It is also known as cattle plague re...

R in d e rp es t It is also known as cattle plague resulting in high fever, diarrhoea and high mortality rates. In year 2006, OIE has declared that India is free from rin

What do you understand by haemagglutinins, Q. What do you understand by Hae...

Q. What do you understand by Haemagglutinins? Haemagglutinins are the globulin type of proteins which are present in the seeds of plants like double bean, field bean, white be

Physical properties of carbohydrates, PHYSICA L PROPERTIES All mono...

PHYSICA L PROPERTIES All monosaccharides which have an asymmetric carbon are able to rotate polarized light either to left side ( laevorotatory ) or right side ( dextroro

Indications for surgery-aortic valve disease, Indications For Surgery :...

Indications For Surgery :  The normal aortic valve area in the adult is about 3-4 cm2. Significant symptoms occur when the valve area is seduced to 1/4"' the normal area

Extracellular signals, extracellular signals and their characteristics

extracellular signals and their characteristics

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