Formation of gemmules, Biology

Assignment Help:

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.


Related Discussions:- Formation of gemmules

Explain the amphibian heart and the reptile heart, What is the difference b...

What is the difference between the amphibian heart and the reptile heart? The reptiles have double and incomplete circulation too, three heart chambers (two atria and one ventr

Explain innate immunity, Distinguish among epimorphic and morphallactic reg...

Distinguish among epimorphic and morphallactic regeneration, giving single example of each. Explain innate immunity. Name and explain the category of barrier which includes mac

ASSINMENT, HISTORY ON CLASSIFICATION IN BIOLOGY

HISTORY ON CLASSIFICATION IN BIOLOGY

Explain the functionality of hot air oven, Explain the Functionality of Hot...

Explain the Functionality of Hot Air Oven? Hot air oven sterilizes the object by hot dry air. It kills the microorganisms by oxidizing cellular constituents. Dry Heat is less e

What are the differences between astral and anastral mitosis, What are the ...

What are the differences between astral and anastral mitosis? Astral mitosis is that in which there is structure of the aster, a structure made by the centrioles. Anastral mito

What is the meaning of accumulation, What is the meaning of accumulation ...

What is the meaning of accumulation The word "accumulation" is used in many of the definitions in the sense that th e horizon must have more of the material in question than i

How is a prototype drug different from other drugs, How is a prototype drug...

How is a prototype drug different from other drugs in the same class?

Define mineralizations and formation of new bone, Define Mineralizations an...

Define Mineralizations and formation of new bone? Vitamin D plays a role in the synthesis of a prominent non collage nous protein, osteocalcin, a vitamin K- dependent protein f

What are the attribute of amylase inhibitors, What are the attribute of amy...

What are the attribute of amylase inhibitors? This has been attributed to a number of reasons, Let us see how these inhibitors act. The inhibitor forms a complex with amylase,

Effective utilization of agro- industrial by- products, Research Priorities...

Research Priorities for Effective Utilization of Agro- Industrial By- Products Biotechnology including recombinant DNA techniques provides for genetic modifications in plants a

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