As the organ of a plant that does not have an articulate eye and the direction of the growth growth down to Earth, according to the gravity of the Earth.(Positivegeotropism) is formed from the radicle of a light source (embryo), which is located within the root changes come from seeds re di bin. As the growing roots in the first stage (Primary growth) in the root part of the pet or plant a monoculture, there are some.Growth stages 2 (Secondary growth).
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