Los meristemas de la planta (puntos de elongación, que pueden ser apicales, radiculares o axiales) están compuestos por tejido a) Vascular
b) Esponjoso
c) Epidérmico
d) Fundamental
e) Fotosintético

meteorologists would compare a new weather map with one 24 h old to see how fast a front is moving.

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explanation:

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i'm thinking (a) to keep sand in place; ////////////

explanation: a sand fence or sandbreak, like a snow fence, is used to force windblown, drifting sand to accumulate in a desired place. sand fences are employed to control erosion, sand dune stabilization, keep sand off roadways, and to recruit new material in desert areas.