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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.
What are sieve tubes suited for translocation of food? a.bordered pits b.no end walls c.bordered lumen and perforated cross walls D.no protoplasm
Discuss in short about soil " The collection of natural bodies in the Earth's surface, in places modified or even made by man of Earthy materials, containing living matter an
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Define Stress Factors - Etiological Risk Factors in Cancer? Emotions playing a part in malignancy are not a new idea. But these relationships are extremely difficult to measure
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Synthesis of Hormones - Testies Leydig cells and the Sertoli cells are the steroid hormone synthesising cellular sites of the testis. Leydig cells are the major source of the
In chemistry and particularly in biochemistry the fatty acid is a carboxylic acid with a long aliphatic tail (chain) that is either saturated / unsaturated. Many obviously occurrin
The three charges in the are at the vertices of an isosceles triangle. Let q = 7.00 nC and calculate the electric potential at the midpoint of the base.
MECHANISM OF URINE FORMATION - Production of urine is uripoisis or diuresis. First of all it was explained by Kushney. Nephron separates acidic urine from basic blood, so ma
In unilocular ovary with a single ovule tje placentation is??
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