Fertilization in earthworm, Biology

Assignment Help:

In earthworms, when the ovaries mature, the clitellum secretes a viscous substance in the form of a girdle. This girdle hardens in to a cocoon around the clitellum. The ova are discharged into cocoon. When this cocoon moves over the spermathecae openings, the sperms which are already collected from another worm and stored in the spermathecae are discharged into the cocoon. The cocoon finally, comes out of the body and fertilization takes place in the cocoon. As it is taking place outside the body, it is called as "external fertilization".


Related Discussions:- Fertilization in earthworm

Explain food borne toxic infections, Q. Explain Food borne toxic infections...

Q. Explain Food borne toxic infections? Ans. The food borne toxic infections, you may recall reading earlier, are caused by the ingestion of a large numbers of ent

What is electro osmosis , What is Electro osmosis ? Electro osmosis :...

What is Electro osmosis ? Electro osmosis :  Electroosmosis is the movement of charged molecules along a charged surfaces in response to a voltage difference. For example, e

What is the role of stomach in human body, What is the role of Stomach in h...

What is the role of Stomach in human body? The stomach serves both to digest food and to hold it so that it can be gradually released into the small intestine. Food stays in th

Define effect of protein excess during pregnancy period, Define effect of P...

Define effect of Protein excess during pregnancy period? It is not advisable to recommend protein supplements. Reports in the literature indicate that high-protein supplements

Cellulose is not consumed by human beings but some animals, Since Some anim...

Since Some animals, particularly ruminants and termites, can digest cellulose with the help ofsymbiotic micro-organisms that live in their guts. Humans can digest cellulose to some

Symptoms of inflammatory bowel disease, Q. Symptoms of inflammatory bowel d...

Q. Symptoms of inflammatory bowel disease? Inflammatory bowel diseases are associated with: • Abdominal cramping, diarrhoea • Steatorrhoea • Obstruction caused due t

Antagonistic mechanisms manage homeostatic regulation, Q How do antagonisti...

Q How do antagonistic mechanisms manage homeostatic regulation? The homeostatic maintenance of the body typically occurs by means of alternating antagonistic compensatory mecha

Define basic working of the endocrine system, Q. How does the circulatory s...

Q. How does the circulatory system participate in the functioning of the endocrine system? The circulatory system is basic for the functioning of the endocrine system and the b

#tzoology, #affinities of ctenophora with platyhelmintheson..

#affinities of ctenophora with platyhelmintheson..

What is isq, What is ISQ In resonance frequency analysis implant stabil...

What is ISQ In resonance frequency analysis implant stability quotient (ISQ) is use to quantify the frequency measurement of implants within a range between 3500 and 8500 HZ. I

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