Formation of gemmules, Biology

Formation of Gemmules

Throughout the formation of gemmules, masses of food - laden amoebocytes called archaeocytes feed on other cells and lay down in within them. They get surrounded by spongiocytes (other kind of amoebocytes). The latter secrete a two layered hard covering. A tiny pore, the micropyle, is left as a small opening in this protective shell. After that, some scleroblasts (spicule-producing cells) come to lie among the two layers of the shell and produce spicules. The gemmules are now finished. The parent sponge may now disintegrate leaving behind the gemmules. On revival of favorable conditions, the gemmules begin development. The centrally located archaeocytes emerge out by the micropyle as a mass which undergoes cell division and differentiation to generate a new sponge.

Posted Date: 2/5/2013 12:21:54 AM | Location : United States







Related Discussions:- Formation of gemmules, Assignment Help, Ask Question on Formation of gemmules, Get Answer, Expert's Help, Formation of gemmules Discussions

Write discussion on Formation of gemmules
Your posts are moderated
Related Questions
What is Optic Chiasma  This structure makes upto portion of the anterior inferior floor of the third ventricle. It is shaped like a flat oblong bridge and connects the optic ne

During digestion, the role of pancreatic lipase is to: -digest cholesterol into dimethlyalpyrophosphase -inhibits interactions between lipids and bile salts -hydrolize TG

Q. What is the significance of magnesium for plants? What are the other major biological functions of magnesium? Magnesium is basically vital for plants because it is part of t

Q. What is Acute Severe Mitral Regurgitation? Acute severe mitral regurgitation is a medical emergency. Patient presents with breathlessness and low output state. He may be is

Normal 0 false false false EN-US X-NONE X-NONE MicrosoftInternetExplorer4

If children obtain half their genes from one parent and half from the other parent, why aren't siblings identical?

Q. What are the elements that constitute the internal ear? What are the functions of those structures? In the internal ear there are the semicircular canals and the cochlea. Th

Removal of a patient's peripheral intravenous catheter resulted in brief bleeding and the loss of a small amount of blood. Which of the following processes occurred during the form

A double-stranded piece of DNA, 100 base pairs in size, is exposed to a high pH environment. This causes all non-valent interactions to be disrupted. What will result from this tre

Would you expect the muscle fibers of the tongue to be striated or smooth? What about the muscle of the diaphragm/ Explain your answer.