How a plant grow up against gravity
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Gravitropism (also known as geotropism) is a coordinated process of differential growth by a plant in response to gravity pulling on it. ... That is, roots grow in the direction of gravitational pull (i.e., downward) and stems grow in the opposite direction
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Trees (and most other plants) detect gravity using tiny structures within the cells of their roots and shoots called 'statoliths', which tell them which way is up (a process known as 'gravitropism'). ... The tree responds by growing its roots downwards and shoots upwards.
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