Cnidaria and platyhelminthes - larval forms, Biology

Assignment Help:

Cnidaria and Platyhelminthes - Larval forms

Cnidaria

The common larval stage that is found in cnidarians is the planula which forms following gastrulation. The planula is elongated and radially symmetrical along with anterior and posterior ends. The surface is covered by ciliated cells. A mouth may be present, sometimes at the posterior end of the larva and the larva attaches by its anterior end. The planula might settle down to form a polyploids scyphistoma that ultimately farms the medusa. In several hydrozoans the planula forms the actinula larva that transforms into the medusa.

Platyhelminthes

Development in parasitic platyhelminths is usually complicated with several free swimming to parasitic larval forms. The progression is from miracidium to sporocyst to redia and cercaria.


Related Discussions:- Cnidaria and platyhelminthes - larval forms

How can the abundance and diversity of living beings, How can the abundance...

How can the abundance and diversity of living beings in the tropical forests be explained? The biodiversity of these ecosystems can be defined by the great availability of the

What are the identical proteins, Q. Are proteins with the same number of ea...

Q. Are proteins with the same number of each dissimilar amino acid that forms them necessarily identical proteins? Even if many proteins have the same number of each different

Infective endocarditis, Despite improvements in health care, the incidence ...

Despite improvements in health care, the incidence of infective endocarditis has not decreased over the past decades. Infective endocarditis is lethal if not aggressively treated w

What is the food sources of proteins, Food Sources of Proteins Food pr...

Food Sources of Proteins Food protein sources can be divided into 3 major categories: a.  Protein of Animal Origin b.  Protein of Plant Origin c.  Single cell protein

Determine the blood plasma levels of glucose, Which of the following serves...

Which of the following serves as an actuating signal, or as part of an actuating signal, in a negative feedback system? A. Blood plasma levels of Glucose. B. Blood plasma le

Which disorders is most likely to underlie, A healthy, primiparous (first-t...

A healthy, primiparous (first-time) mother delivered a healthy infant several hours ago, but the mother has experienced postpartum hemorrhage. Which of the following disorders is m

Nutrition, prove oxygen is produced during photosynthesis in the presence o...

prove oxygen is produced during photosynthesis in the presence of light

Marine extremophiles, how to make a assignment on recent research on marine...

how to make a assignment on recent research on marine microbiology

What is a goiter, What is a goiter? What is endemic goiter? How is this pro...

What is a goiter? What is endemic goiter? How is this problem socially solved? Goiter is the abnormal enlargement of the thyroid gland. The goiter appears as a tumor in the ant

Which organ releases the female gamete under formation, Q. What is the orga...

Q. What is the organ that releases the female gamete under formation? How is this release triggered? What is the organ that collects the released gametes? The organ that libera

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