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

Define the functional properties of proteins, Define the Functional Propert...

Define the Functional Properties of Proteins? a) Hydration properties (dependent on protein-water interactions), which include properties like swelling, adhesion, dispersibilit

Determine by nutritive muscular cell?, Determine by nutritive muscular cell...

Determine by nutritive muscular cell? The cells which form the gastrodermis lining the inner cavity of cnidarians. They carry out two functions: First is to absorb and digest f

Infectious bursal disease, I nfe c tio u s bursal disease Infectio...

I nfe c tio u s bursal disease Infectious bursal disease (popularly known as Gumboro disease) is an acute contagious disease of young chicks caused by an RNA virus, a memb

Explain vulvovaginal candidiasis, Vulvovaginal candidiasis  Vulvovagina...

Vulvovaginal candidiasis  Vulvovaginal candidiasis is not sexually transmitted, but is often found incidentally in women with STIs. Many remedies are available for vulvovaginal

Explain the scanning electron microscope, Explain the Scanning Electron Mic...

Explain the Scanning Electron Microscope It can be used to observe intact cells or cell components directly. Then sections are not necessary. It is used for visualizing surface

Explain deteriorative changes in fats and oils, Explain Deteriorative chang...

Explain Deteriorative changes in fats and oils The food products undergo changes in flavour due to the chemical changes occurring in fats and oils present in them. The causativ

Define the term - the inner life of the genome, Based on your reading of th...

Based on your reading of the article "The Inner Life of the Genome" which of the following is a wrong statement regarding the organization of chromosomes within the nucleus? A.

Explain what is periodontal condition, Explain what is Periodontal Conditio...

Explain what is Periodontal Condition? If intact attachment apperatus without pocket, time is critical direction toward non-surgical repair to prevent periodontal breakdown

#title.circulatory system, #question.what is the mechanism of circulatory s...

#question.what is the mechanism of circulatory system .

Determine biologically compatibility of implant materials, Biologically com...

Biologically compatibility od implant materials An ideal implant material will elicit mainly physiological reactions within the surrounding tissues (bone, connective tissue and

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