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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".
Nature of Stress - Responses of Plants to Stress As mentioned in the preceding section, stress can be considered as any deviation in environmental condition from optimal for t
Determine the biologic response The biologic response can include: i) Metabolic disturbance. ii) Inflammatory response iii) Immune response iv) Mutagenesis v) Ca
Plot the amount of DNA in the nucleus of spermatogonia from the G1 stage prior to the first meiotic division through the completion of meiosis. Label each of the major stages of th
How is water's importance to life reflected in the normal range of internal pH values that living things are likely to have?
Q. Explain Therapy for diarrhoea? The therapy for diarrhoea thus consists of: 1. Determining the status of dehydration 2. Fluid management * Oral Rehydration Therapy (
State about the blood-aqueous barrier There is a blood-aqueous barrier which prevents the movement of substances from the plasma to the aqueous humour. If there is a breakdown
Several living organisms exhibit the unique property of producing visible light. Compound that is oxidized with subsequent light emission is generally referred to as luciferin. Wha
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What is the meaning of Food Exchanges Food exchanges mean grouping of foods in which the specified amount of all the food provides approximately equal amounts of carbohydrate,
Cytoplasmic bridge formed during the conjugation of paramoec: The two paramoecia that undergo conjugation are called conjugants. During conjugation, the two conjugants com
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