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

What are analogies for mitochondria, Explain What are analogies for mitocho...

Explain What are analogies for mitochondria? Ans) Well, as we know, the mitochondria are the producers of lots of a cell's energy and the nucleolus makes ribosome's.

X-ray chest and ecg, X-ray Chest It is helpful in assessing heart size...

X-ray Chest It is helpful in assessing heart size. One should look for presence of pericarditis, pulmonary oedema or pulmonary congestion. ECG One should look for pro

Activation of a fatty acid, Small-  and  medium-chain   acyl  CoA  molecule...

Small-  and  medium-chain   acyl  CoA  molecules  (up  to  10  carbon  atoms)  are readily capable to cross the inner mitochondrial  membrane by diffusion. Furthermore, longer chai

Basics of echocardiography, Echocardiography is one of the -most frequent...

Echocardiography is one of the -most frequently used imaging modalities for diagnosing cardiovascular diseases. It i's versatile and is applicable in the entire spectrum of

Psychology, Which theory focuses on how people are different than animals? ...

Which theory focuses on how people are different than animals? Functionalism Eclecticism Humanism Behaviorism

Thermodynamics and energy, Thermodynamics and Energy 2 types of en...

Thermodynamics and Energy 2 types of energy (kinetic and potential) Work is the transfer of energy from one place to another Energy isn't lost, only converted è fi

What is a graduated cylinder and how is it used, What is a graduated cylind...

What is a graduated cylinder and how is it used? A graduated cylinder is a piece of laboratory glassware used to accurately calculate out volumes of chemicals for use in reacti

Elaborate immune response system and their categories, Elaborate Immune Res...

Elaborate Immune Response system and their categories? The immune response is a group of defenses that the body has developed to combat disease-producing agents, or pathogens.

What are antifoaming agents, What are Antifoaming Agents In food indust...

What are Antifoaming Agents In food industries, undesirable foams may be  formed such as in concentration of fruit juices, coffee extracts, vegetable oils and syrups or in ferm

Explain the complications of burns, Explain the Complications of Burns? ...

Explain the Complications of Burns? Most minor burns are superficial and do not cause complications. However, deep second-degree and third-degree burns swell and take more time

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