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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. Explain Microbiology of fruits? Ans. Fresh fruits, like vegetables, are in a close vicinity of ground and hence may have varied flora of microorganisms. Nature has
explain transport system in earth worn
Which of the following is true for a toe corticospinal interneuron that produces action potentials during voluntary movements of the big toe of the right foot? A. Its dendrites
Pattern of Limb Development The first visible sign of limb development is the appearance of ridge or thickening on each lateral side of the embryo of amniotes. The ridge call
Hom o sapiens neanderthalensis (NEANDERTHA L MAN) - Fossil discovered by C. Fuhlrott (1856) from Neander htat valley of Germany. This resembled modem man, cran
vasoconstriction
structural adaptation of mammalian alimentary canal
Q Do fishes present an closed or open circulatory system? How many chambers does a fish heart have? How does blood flow throughout the fish body? As in every vertebrate the cir
Explain the Storage of Vitamin E? Vitamin E is mainly stored in muscles and adipose tissue. Vitamin E content of erythrocytes is about 20 percent of that in plasma and there i
Adsorption - Colloidal particle Colloidal particles attract and hold to their surfaces the molecules of various gases, vapors and other matter with which they come into contact
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