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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".
Wetlands and estuaries are transitional biomes. Land that remains flooded either part of the year or permanently with fresh or salt water is known as wetland. The internationally a
Disaccharides can be understood as follows 1.Sugars made up of the two monosaccharides held together by the covalent bond; like sucrose and lactose . 2. Type of sugar (sacch
why do ecological models commonly have limited applications?
what is nuclus
Q. Requirements of Glutamine in diverticular disease? Glutamine: Wile specific nutrients that may have an impact on diverticula disease have not been studied as thoroughly as t
Define the Classification of Proteins? Proteins vary widely in. their properties. We suggest you look up this unit once again now as the information about proteins and their pr
Explain the Predator-Prey Relationships ? The feeding by a population of one species upon members of another species is referred to as predation. Many scientists also consider
Triple Vessel Disease (TVD) : Patients with triple vessel disease and impaired left ventricular function do badly on medical treatment. They are candidates for CABG. Operation is
Explain some Precautions for Preparation of Chloride Buffers? 1. Glass electrodes should always be before and after measuring pH with a tissue paper. 2. The pipettes should
What is osmotic pressure? Osmotic pressure is the pressure formed in an aqueous solution by a region of lower solute concentration upon a region of higher solute concentration
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