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Temperature - Seed Dormancy
Low temperature treatment is an essential prelude to germination in many seeds, and high temperature may be inhibitory at the time of germination. The low temperature chilling requirement is frequently met artificially by the process of stratification. The seeds are layered in trays in cold moist air for a period of several weeks or months. Temperatures between 0 and 10?C are most effective. The chilling requirement is variously located in the embryo or the seed coat, sometimes in both. The chilling requirement of apple seeds, for example, is much longer for intact seeds than for seeds with the coats removed, or for isolated embryos. Red light and GA have a synergistic effect, that is, the combination of both factors stimulates germination more than the sum of the two separately.
Define Energy needs during pregnancy Period? Two factors determine energy requirements: increase in mother's basal metabolism to support the work required for foetal growth and
Compare and contrast the effect of a deletion in the operator of the lactose operon with one in the operator of the histidine operon.
Q. What are the main risk factors for hypertension? The major risks factors for hypertension are tobacco smoking, stress, obesity, sedentary lifestyle and alcoholism.
Cellular Type - Endosperm In this type, as the name indicates, the division of the primary endosperm nucleus is immediately followed by the laying down of a wall, which is us
Echinococcosis (hydatidosis) Echinococcosis, also called hydatidosis, is a global problem particularly in countries where sheep and cattle raising forms the major animal husba
Corpus Allatum and Juvenile Hormone The corpora allata are rounded glands attached to the posterior side of every corpus cardiacum making a compact body just behind the brain.
How different are animal cells from plant cells? Whereas plant cells are eukaryotic, autotrophic, photosynthetic and have chloroplasts and cell wall, the animal cells are eukar
What is tahe excretory organ of Agama lizard
Q. What is the evolutionary importance of pteridophytes? As the first pteridophytes, tracheophytes were also the first plants to extensively colonize the terrestrial environmen
Q. What do you mean by Borrowed Materials? For the study of as much relevant material as possible the material is obtained on loan. Borrowed specimens benefit the' lending inst
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