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

Preliminary screening stage of battery, Preliminary screening stage of batt...

Preliminary screening stage of battery During the preliminary screening stage in the development of the battery, items in the original pool that did not attain satisfactory int

State in brief about the comprehensive neuropsychology, State in brief abou...

State in brief about the Comprehensive neuropsychology Comprehensive neuropsychology testing needs a combination of Context related ideometric and quantitative psychometric app

Proteins - digestion process, Proteins are very essential macromolecules as...

Proteins are very essential macromolecules as they have a range of many important functions like: • Required for building and repair of body tissues (including muscle) • Enzy

Nutritional management of steatorrhoea, Q. Nutritional management of steato...

Q. Nutritional management of steatorrhoea? The Nutritional management of steatorrhoea should focus on the following: • Plenty of rest and relaxation and avoid stress •

Define effect on human placental lactogen in pregnancy, Define effect on Hu...

Define effect on Human placental lactogen in pregnancy? Human placental lactogen, with a structure similar to the growth hormone, increases throughout pregnancy. Its rate of pr

Explain methods used for estimation of vitamin c, Explain Methods Used For ...

Explain Methods Used For Estimation of Vitamin C? The most commonly used methods to determine ascorbic acid in foods are: 1. Titrimetric methods - The 2, 6 dichlorophenol in

Bacteria, explain anatomy of bacteria

explain anatomy of bacteria

Agro industrial-iron, Iron Iron is an essential component of the prote...

Iron Iron is an essential component of the proteins involved in oxygen transport or utilization. These proteins, including hemoglobin, myoglobin and a number of cytochrome and

Explain the life cycle of nitrogen, Explain the life cycle of Nitrogen ? ...

Explain the life cycle of Nitrogen ? Nitrogen cycle: Along with carbon, hydrogen, and oxygen, nitrogen is one of the most common elements that form biological molecules. Nitr

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