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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.
Pox diseases Small-pox in human beings and pox in a few animal species are closely related to each other. It is shown by the fact that the vaccine for the prevention of small
Q. What is QT Dispersion? Is the difference between the QT interval measured from one part of the heart and the QT interval measured from another part of the heart. The QT inte
These are solid, liquid or gaseous substance present in the atmosphere in such concentrations, as may be or tend to be injurious to human beings or other living creatures, plants a
Making leaf collections Collect young leaves of as many varieties of plants as possible. Place various layers of news- paper or blotting paper on a firm, smooth board. Next org
Why Chordates are Schizocoelic, while other deuterostomes are enterocoelic?
What is inharmonious ecological interaction? Inharmonious, or negative, ecological interaction is that in which at least one of the participating beings is harmed.
Descriibe Mechanical Ventilation and Cardiac Performance During spontaneous breathing, the intrathoracic and intrapulmonary pressures are negative, while with mechanical venti
5 beneficial effects of decomposers and 2 harmful effects
What are the major terrestrial biomes? The main terrestrial biomes are: tundra, taigas (or boreal forest), tropical forests, temperate forests, grasslands and deserts.
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