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 iron deficiency anaemia during pregnancy, Define Iron deficiency ana...

Define Iron deficiency anaemia During pregnancy? Iron deficiency anaemia (microcytic hypo chromic anaemia) is widespread among adolescents and young women during their reproduc

Aschelminthes, in what part of the human body aschelminthes found?

in what part of the human body aschelminthes found?

Define derived proteins - primary protein derivatives, Define Derived prot...

Define Derived proteins -  Primary Protein Derivatives? Derived proteins are the derivatives of the protein molecule, apparently fonned through hydrolytic changes in the molecu

Why water is considered a universal solvent, Water is considered a universa...

Water is considered a universal solvent because- Select one: a. it can dissolve polar and non-polar compounds b. it can dissolve both positively and negatively charged ion

What is the primary structure of a protein, What is the primary structure o...

What is the primary structure of a protein? What is the significance of the primary structure? The primary protein structure is the linear sequence of amino acids that form the

Following statement true for prokaryotic or eukaryotic, Following statement...

Following statement true for prokaryotic or eukaryotic? They use deoxyribonucleic acid as their major information storage molecule

Breeder select for in a cereal crop, What characteristics might a breeder s...

What characteristics might a breeder select for in (i) a cereal crop, (ii) a farm animal? (i) In a cereal variety, a breeder might select for high yield; disease-, frost- or dr

Explain prostaglandins, Prostaglandins Prostaglandins belong  to a sub...

Prostaglandins Prostaglandins belong  to a subclass of  lipids known  as the eicosanoids because of their structural similarities to  the C-20  polyunsaturated  fatty acids, t

What is the location of the salivary glands in humans, What is the location...

What is the location of the salivary glands in humans? There are 6 major salivary glands and they are located one in every parotid gland, two beneath the mandibles (submandibul

Explain lopinavir and its adverse effects, Explain Lopinavir/ritonavir  ...

Explain Lopinavir/ritonavir  Lopinavir is available in the US only in a fixed-dose combination with ritonavir . In treatment-naïve patients a regimen with lopinavir/ritonavir w

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