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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.
Bioavailability of Minerals It is well known that the concentration of a nutrient in a food is not a reliable indicator of its nutritional value. In other words, the entire qua
Q. What is the difference between the reptile heart and the amphibian heart? The reptiles have incomplete and double circulation three heart chambers two atria and one ventricl
Inversion We know that atmosphere is heated from below and warm air rises, but air can be prevented from rising by a condition known as inversion. An inversion refers to a situ
The allele that causes albinism (p) is recessive to the allele for normal pigmentation (P). A normal woman whose father is an albino marries an albino man whose parents are both no
Munch Pressure Flow Model Munch, a German plant physiologist, proposed in 1930, a simple physical model which can be tested in the laboratory for the mechanism of phloem trans
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.
Stratification - Aquatic ecosystems Aquatic ecosystems also exhibit marked stratification. In lake and ocean ecosystems light penetration, temperature and availability of oxyg
Define physiological effects of SCFA? The physiological effects of SCFA's can be summarized as follows. They: Lower the ph in the gastrointestinal tract, which in turn r
Nature of Light - Floral Induction Red light promotes flowering in short day plants. If the dark regime of a short day plant is interrupted by red light, flowering is inhibite
Explain What are analogies for mitochondria? Ans) Well, as we know, the mitochondria are the producers of lots of a cell's energy and the nucleolus makes ribosome's.
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