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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".
Q. What is biodiversity? The Biological diversity is the variety of species of living beings of an ecosystem. In the ecosystems which are more biodiverse, like tropical forests
Why Fats, Oils and Sugar are important for human body? This group imparts flavour to the items and thereby improves the palatability. Items incorporating them do melt in the mo
Exchange of oxygen, nutrients, carbon dioxide and waste products from mother to fetus takes place through diffusion across the: a) Chorionic villi (pron: core-e-on-ick villi)
Excretory organ of crustaceans and agama lizard
discuss about protozoa,metazoa,mesozoa and parazoa
Give detailed structure of gills,book lungs
Examination is begun by placing the transducer in left parasternal region, usually in the third or fourth left intercostal space. From this position, a sector image of the heart
Fluorescence Microscopy Certain compounds when exposed to short wavelength radiations, e.g., UV and X-rays. absorb and emit energy as light of a longer wavelength. This process o
Characteristics of Thin Gingiva Highly scalloped soft tissue and bony architecture Delicate friable soft tissue Minimal amount of attached gingiva Thin underlying
why sporophyte of psilopsida is rootless
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