what is the different beteween underground roots and underground stems?
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Taking a guess here but I  would think in a way.. some plants have growth underground like carrots, potatoes, onions, etc. The underground roots stay underground lol, they absorb fluids, aka water and grow from underneath then the stems are actually what blossoms out of the dirt. It is the result of the outgrowth the root has made. I have no idea what I'm saying here :P
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apical meristem. thats where all new growth on a plant comes from. however, if its cut off, a most plants can create a new apical meristem.
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peanuts grow underground and cashews grow in pods on trees
845813
All mosses have leaves and stems but not so with liverworts.  The stalks of liverworts are white or translucent and they are weak. In mosses the stems are green or brown in color and are stronger. The rhizoids (the roots) of liverworts are single cell structures while mosses are mufti cellular.Liverwort spore capsules open along 4 valves with mosses the capsules open at the end. This is just a few differences but I hope it helps you.
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Initially a spore (the fungal equivalent of a seed) lands on some suitable ground. It starts to grow underground, pushing out mycelium (fungal threads) in all directions. As the mass of mycelium grows the central part dies off, leaving a disc of mycelium growing at the outer edge. Eventually, when season and weather allow, mushrooms are produced above the mycelium and release spores. Sometimes, several years may go by before mushrooms are seen at a fairy ring. The underground presence of the fungus sometimes causes withering or varying colour or growth of the grass above.
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Several types. Read about it at http://horticulture.coafes.umn.edu/vd/h5015/99papers/kostreba.htm
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UNDergroUND\n\nnever seen this one before - thanks for the brain excersize!
523514
one of the most recently evolved are grasses (a herb)-they are also very adaptable (unlike many orchids which are also recent) as they can go dormant with an underground rhizome when condition are not suitable for active growth and their leaves grow from the bottom instead of the top so their growth won't be disturbed if someone takes a bite from the top.
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They are called horizons.  The top inch or so is the top soil, the next 15 inches is the subsoil and then you come to the parent material.
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c-both apical and lateral meristems
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Finntroll\nTurisas\nAmon Amarth(kinda)\nWintersun\nEnsiferum\nNorther\nChildren Of Bodom(kinda)
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http://www.gardenersnet.com/bulbs/elephantears.htm
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Fibrous roots:\n1. Grasses\n2. Corn\n3. Marigold\n4. Rye\n5. Phlox\n\nLateral Roots:\n1. Oak\n2. Birch\n3. Maple\n4. Orange\n5. Apple
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Try UGO - UndergroundOnline\nhttp://www.ugo.com/
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plants that r fixed to soil. eg- trees
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Traditional drip irrigation is found above ground, with subsurface drip irrigation the lines can be buried below ground for a long, trouble-free life. Subsurface irrigation allows the precise application of water, nutrients and other agro- chemicals directly to the root zone of plants. This allows the farmer to optimize the growing environment and leads to higher quality and quantity crop yields.
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Some Monocots have a Lateral Meristem called the Secondary Thickening Meristem which produces Secondary vascular tissues. Examples of STM are Aloe Dracaena Cyperus Yucca.