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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".
What is the difference between self pollination and cross pollination? Which of these two modes of pollination contributes more to the plant diversity? Self pollination happens
Structure of the Vascular System The layers of the vascular system are all similar in veins and ateries. The difference of thickness of various layers constitute the functio
Demonstration of specific antigen(s): The presence of the viral antigen in the infected tissues and cells can be demonstrated by fluorescent antibody technique (FAT) and
Explain in brief about the ciliary muscle During accommodation the ciliary muscle contracts and in turn the size of the ciliary ring is reduced. This results in the suspensory
A cat has just arrived to the veterinary clinic with low blood pressure. The cat weighs 5 kg, and as the on call Vet you want to use a bag of saline to prepare a dopamine drip for
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briefly explaintransport system in earthworm
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