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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 vestibular system? How does it operate? The vestibular system is the part of the ear that participates in the control and regulation of the equilibrium of the body
Assessment You can observe it visually at birth. The anterior abdominal wall is absent and the posterior bladder lining which is bright red in colour is exposed. Urine seeps
why we call leech as sangivorous
What is the type of egg in which yolk is absent?
Define Tests to Measure Flexibility Component in the Humans? The flexibility component measures the elasticity or range of motion around a joint. This component of physical fi
Explain metachrosis in frogs? How it is different from change of skin colour of chemleon?
Classification of Protozoa Traditionally, protozoans have been classified as flagellates, amoebae, sporozoans and ciliates. We have retained this broad grouping for convenienc
A decrease in parasympathetic discharge to the heart leads to A. a decrease in the conductance of F-channels in SA node cells. B. an increase in the conductance of potassium
Explain the process by which the kidney varies the volume and concentration of urine
Define the term - microfilaments and microtubules The cytoskeleton is, in fact, termed as the "bone and muscle" of the eukaryotic cell, and is composed of a network, consisting
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