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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".
E. coli strains containing the plasmid pAMP are resistant to ampicillin. Describe how this plasmid functions to bring about resistance.
A cDNA library is made by using the reverse transcriptase of a retrovirus to synthesize cDNA (complementary DNA) copies of the total mRNA from a cell (or perhaps a subfraction
Q. In ancient Greece the father of Medicine, Hypocrates, described a method of diagnosing diabetes mellitus by tasting the patient's urine. What is the physiological explanation fo
A 19 year old model for Glamour magazine tripped over an extension cord causing injury to her epidermis. She is afraid the injury will leave a scar. Based on your knowledge of rege
Concerning the nitrogen-containing bases that participate in nucleotides, what is the difference among DNA and RNA? In DNA nucleotides can be formed of adenine (A), thymine (T)
List er i o si s The disease is caused by Listeria monocytogenes - Gram positive small non spore- forming bacilli seen in soil, silage, sewage and feces of animals and b
Each of the three eukaryotic RNA polymerases has more subunits or 12 and so these are big complex enzymes. The genes encoding some of the subunits of each eukaryotic enzyme show
The urea cycle which is also known as the ornithine cycle is a cycle of biochemical reactions occurring in several animals which produces urea ((NH2)2CO) from ammonia NH3. That cyc
what is the biological significance of the skeleton and supporting system in animals
Q. What are the major human diseases caused by virus? Among diseases caused by virus are common cold, variola (considered eradicated nowadays), mumps, measles, rubella, AIDS, t
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