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Effect of Temperature
Certain plants such as the winter rye (Secale cereale) and the biennial strain of henbane (Hyoscyamus Niger) require exposure to low temperature conditions before they start flowering. A phenomenon known as 'vernalization' or 'Yaronization' was noted by the Russian Plant physiologist Gustav Gussner in 1915. Here also embryo or shoot apex seems to be the site of perception and the role of a hormone 'Vernalin" is suggested. Unfortunately like florigen, vernalin has been still elusive. Gibberellin treatment is known to substitute for cold treatment.
Explain the Reproductive System? The human reproductive system produces not only reproductive organs and gametes, but also sex hormones, which have far-reaching effects on huma
The Phenomenon of acid rain was first introduced by Rober Angus smith in 1852. Is means presence of excessive acids in rain water? Acid rain is a form of precipitation (rain, sn
What is consanguineal marriage? Why is the appearing of genetic disease more probable in the offspring of a consanguineal marriage? Consanguineal marriage is the marriage among
You have learnt about the epidemiology, etiology and pathogenesis of acute rheumatic fever. Revised Jones criteria, which have major and minor criteria, are helping to diagnosis of
Extracellular Aging The basic components of extracellular space are mucopolysaccharides and fibrous proteins, particularly collagen and elastin. These proteins are synthesised
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Motor Control in Annelids and Arthropods In annelids and arthropods generally, individual metameric ganglia of the ventral nerve cord are capable of initiating and keep locomo
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Determine about the degenerative diseases Immune responses in brain can quickly spiral out of control and cause further harm. In degenerative diseases such as Parkinson's, Alz
These circular orifices are located at the upper ends of the outflow parts of the left and right ventricles respectively. The pulmonary orifice which is 3 cms, is 0.5 cm larger tha
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