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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.
What is an analogy for microtubules? Microtubules have two major functions in cells and in doing so act such as a skeleton as well as like railroad tracks. Microtubules are the
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Plate Tectonic Is a Theory of Geology Which describes the large scale motion of earth's lithosphere. The theory builds on the older theory of continental drift from the first half
organism that can not exist in the presence of oxygen ?
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If one determines the concentration of cortisol in the blood plasma to be 10 ugrams/ml and that in a 24 hour period a person excretes 10 mgs of cortisol, calculate the volume of bl
Q What are the major classes into which the phylum is divided? What are the few examples of each and in which form (polyp or medusae) are they found? Coelenterates are divided
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