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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.
Define the Term Epimerism? In addition to D and L isomerism sugars also exhibit epimerism. Hexoses that differ from each other as a result of variation of H and OH on carbons 2
Explain about the cyclamate - artificial sweeteners? Another sweetener is cyclamate (sodium cyclohexylsulphamate). Have a look at its structure as shown in the figure. It is on
Q. Which are the organs of the excretory system? The excretory system is formed of ureters (two), kidneys (two), bladder and urethra.
If we were to completely eliminate one group of marine organisms from ocean, which would most likely be fatal to Marin fish populations? Elimination of: a) Starfishes b) Dia
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Which of the below is a term for mononuclear, granulocytic white blood cells which produce immunoglobulins? a) Platelets b) Lymphocytes c) Erythrocytes (pron: eh-rith-reh
Alterations occuring in cereal & cereal products, legumes You are already aware of the chemical composition of cereals and pulses. We will now look into changes occurring in t
C omp ut e d radiography: The development of intensifying screen has greatly improved the efficiency of exposure and has reduced the exposure time. The fir
Chlorophyll Chlorophyll, the pigment responsible for giving bright green colour to the vegetables, is very unstable and undergoes changes in colour which are often considered t
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