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 do you mean by an antibiogram, Q. What is an antibiogram? The Anti...

Q. What is an antibiogram? The Antibiogram is a laboratory test intended to guide the choice of sufficient antibiotic to treat a given bacterial infection. In an Antibiogram cu

Fossils, what year was homo erectus fossils found

what year was homo erectus fossils found

Dna, diagram of dna replication

diagram of dna replication

Explain the process of ige-mediated allergic response, Explain the Process ...

Explain the Process of IgE-Mediated Allergic Response? Basically, there are three steps involved with the IgE-mediated allergic response These include: Step 1: Sensitizat

What is a burette and how is it used, What is a burette and how is it used?...

What is a burette and how is it used? A burette is a uniform-bore glass tube with fine gradations and a stopcock at the bottom, used particularly in laboratory procedures for a

Biotechnology, Biotechnology: Biotechnology is, perhaps. best define...

Biotechnology: Biotechnology is, perhaps. best defined as the  industrial utilisation  of biological  systems or processes.  In sense, therefore, biote(biology ha existed fo

Define single beam and double beam optical path, Define Single Beam and Dou...

Define Single Beam and Double Beam Optical Path? In simpler instruments, a single beam of light passes through the cuvettes and reaches the detector whereas in the double beam

Active instruments-coronal disassembly devices, Active instruments - Do...

Active instruments - Do groove occlusally or buccally until reach tooth structure - Apply this instrument then screw to break the bond between tooth structure and crown GC

Induction of mesoderm in amphibians, Induction of Mesoderm in Amphibians ...

Induction of Mesoderm in Amphibians Earlier you know that an event that precedes neural ectoderm induction in amphibians is the induction of mesoderm. Until 32 cell stage in

What are the substances that are constitute the chromatin, Q. What are the ...

Q. What are the substances that are constitute the chromatin? What is the difference between chromosome and chromatin? The chromatin, dispersed in the nucleus, is a set of fila

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