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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".
Eric Davidson isolated and compared the sequences of mRNA transcripts and genomic DNA from the sea urchin. Which of the following is a true statement regarding his findings? A.
Explain Congenital Heart Disease (CHD)? Congenital heart disease is an abnormality at birth in cardiac circulatory structure or function. Optimal management of CHD aims not mer
An ecosystem is a self sufficient interacting system in the biosphere. Eg. forest, desert, pond etc. almost, all the ecosystem have more or less similar fundamental plan for their
What is autophagic intracellular digestion? Why is this type of intracellular digestion intensified in an organism undergoing starvation? Autophagic intracellular digestion is
Explain Phenylephine and Methoxamine in amyl nitrite ? They have opposing effects to amyl nitrite as they increase the systemic BP. phenylephine due to its shorter duration of
Circulation: If central pulses (femoral in infants and carotid in children) are not palpable, begin chest compression without losing any time. In young infants, encircle
Methods of Filter Feeding More elaborate methods of filter feeding are seen in tube dwelling polychaetes which use tentacles to entangle the food particles. Figure shows some
DIGESTIVE SYSTEM OF MAMMALS The tube from mouth up to anus is called alimentary canal. Alimentary canal of man is about 9 meter and rabbit is about 6 meter. Digestive
1)what is plasma membrane? 2)what is multicellularity
What is genetic drift?
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