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

Explain why the pigs in the f2 generation, If you create an F2 generation b...

If you create an F2 generation by mating two of the F1 offspring from your cross of a pure-bred brown pig with a pure-bred heavy spotted red pig. Explain why the pigs in your F2 ge

Explain the classification of carbohydrates, Define Classification of Carbo...

Define Classification of Carbohydrates? Carbohydrates are defined as polyhydroxy aldehydes or ketones or substances that produce such compounds when hydrolyzed. Carbohydrates a

Heart, What is the immediate effects of exercise on the functions of the he...

What is the immediate effects of exercise on the functions of the heart?

Define procedure for testing the presence of starch in milk, Define Procedu...

Define Procedure for Testing the Presence of Starch in Milk 1. Take 1 ml of milk sample in a test tube. 2. Add few drops of iodine solution. (2.5 gm of iodine is dissolved i

Define water losses by visible perspiration, Define water losses by visible...

Define water losses by visible perspiration? The water losses by visible perspiration are highly variable; the amount could be as high as 4L in hot climate or during strenuous

Define results of miscellaneous conditions, Results :  In the present day,...

Results :  In the present day, surgical mortality with or without CABG is repture to be 5-7 per cent. The late survival is 85 per cent, 75 per cent and 65 per cent at 1, 3 and 5

Fixation and movement to echinoderms, Q What is the system that permits fix...

Q What is the system that permits fixation and movement to echinoderms? The system that permits fixation and movement to substrates in echinoderms is called the ambulacral syst

Environment can change the genotype of an individual, What are the situatio...

What are the situations in which the environment can change the genotype of an individual? What is the condition for this type of change to be transmitted to the offspring? The

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