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I think you confused between PGA (Phosphoglycerate) and PGAL (phospho glyceraldehyde). The first step of Calvin Cycle is carboxylation where the 5 carbon RUBP is converted to two molecules of 3 carbon PGA (PHOSPHOGLYCERATE) Then comes the second step where two molecules of ATP and 2 molecules of NADPH is used to reduce PGA into PGAL (PHOSPHOGLYCERALDEHYDE) ...


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I believe that evolution is driven by the needs of the organism to adapt not by the need to adapt for human beings consumption. meaning that some nitrogen gets back to the soil through the effect of nature e.g. fixation of nitrogen during storms and when fecal matter decomposes in soil and these I assume provide enough nitrogen for normal plant growth and ...


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That is an interesting question. But rises some line of thought by analogy, e.g. why people won't evolve to produce their own ATP without mitochondria? (I mean of course Eukaryotas in general). I don't see any reason why multicellular organism cannot incorporate bacterial functionality either as happened with mitochondria, or as just separate cell type, that ...


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I cannot say anything about the general case, or specifically for day-neutral plants. However, Sforza et al. (2012) have studied the effects of light conditions on algae (used for biofuel production), and their results indicate several problems with continuous light. In continuous light conditions they find lower chlorophyll contents and higher carotenoid ...


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The problem lies in soil bacteria. There has been a project on a larger scale: Biosphere 2. After their initial trial they realised $O_2$ levels are getting much lower from what was predicted. The scientists team investigated the problem deeper and came to the conclusion that there was a lot of dead organic matter in the soil, which got consumed by aerobic ...


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Ventricaria ventricosa (previously called Valonia ventricosa) is not exactly a single cell. It has a coenocytic structure with multiple nuclei and chloroplasts. As Jasand Pruski correctly guessed the organism possesses a large central vacuole which is multilobular in structure (lobules radiating from a central spheroid region). The entire cell contains ...


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Placing the leaves in wax paper and under the pressure of several books would be beneficial (in terms of a short term preservation). This method may not be suitable for field preservation, due to the bulky nature of books and other weights, although it might be suitable if using an alternate method of pressure.


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You may want to see: Mark W. Chase, Harold H. Hills; Taxon, Vol. 40, No. 2, 1991, pp. 215-220: 'Silica Gel: An Ideal Material for Field Preservation of Leaf Samples for DNA Studies' Summarized, the process would be the following: Place the leaves inside ziplock plastic bags; Add ten times (minium) the weight of the leaves in silica gel; After 12 hours ...


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It is not possible, that a plant grows without any nutrients. Magnesium for example is needed in every chlorophyll, so there is no photosynthesis without magnesium. Another point is that plants can not get nitrogen from the air, so they have to get it from the soil and nitrogen is present in every amino acid, which build the plants proteins. Proteins are ...



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