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PINEAL GLAND (EPIPHYSIS CEREBRI) -
Hormone - Melatonin concentration in the blood appears to flow a diurnal (day-night) cycle as it arises, in the evening and through the night and drops to a low around noon. Because of this light mediated response, the pineal gland may act as a kind of "biological clock" which may produce circadian rhythms (variations following a 24 hour cycle).
Girls blind from birth attain puberty earlier than normal, apparently because there is no inhibitory effect of melatonin on ovarian function.
Euthenics : It is the study of improvement of human races by providing better conditions. Euthenics means human improvement by altering external factors like as education or the co
Altitudinal Variations We know that temperature decreases with increasing altitude. This is mainly due to convection currents in the troposphere - the lowermost (and most dense
What is Osmosis ? Osmosis : Osmosis refers to the diffusion of water across a semi-permeable membrane from an area of higher concentration of water to an area of lower con
Acute Renal Failure You know that acute renal failure refers to the sudden deterioration in kidney function, characterised by reduced urine excretion to less than 10 ml/kg bo
The peppered moth experiment was an example of directional selection; due to environmental conditions the directional selection shifted from one extreme to the other in 1850s Engla
there are a restriction map of a plasmid and a human gene of known sequence. Your task is to clone the human liver cDNA for this gene so that the start codon is closer to the EcoRI
A diploid cell contains four pairs of homologous chromosomes designated C1 and C2, M1 and M2, S1 and S2, and W1 and W2. Predict the number of different haploid cells that could be
An ecosystem includes
Polychaetes - Feeding and Digestion in Annelids Polychaetes involve both free moving (errant) and sedentary species. The free moving species are usually macrophagous and the s
Match dehydration reaction and hydrolysis reaction to molecule synthesis and molecule break-down
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