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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".
Hydrogen ( H) has 1 electron, carbond ( c) has 6 electrons ; oxygen ( O) has electrons, Nitrogen ( n) HAS 7 electrons. Use the octet rule to determine which of the following is mos
What are the processes involved in the preparation of plant tissue for free hand sectioning?
Nucellus - Ovule Enclosed within the integuments lies a homogenous mass of tissue which is termed as the nucellus. This is the tissue in which the female gametophyte differen
Trends in Succession - Ecology Succession is an important aspect of change in ecosystems and a simple description of successional communities the beginning of the story. We ne
scientific name of apple
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What are risk factors for diseases? Risk factors for a disease are everything that contributes to enhance the risk of the disease to appear. For instance, for most cardiovascul
SKIN - Largest organ of body. It is covered by hairs or pelage i.e. pillifera. Study of skin is dermatology. Outermost covering of body. Skin is elastic and
Illustrate in detail about the Cell The present day study of cells combines many scientific disciplines, like biochemistry, biophysics, genetics, microscopy and physiology. A g
Draw a diagram of external view of a human brain. Label:- frontal lobe, temporal lobe, occipital lobe and cerebellum.
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