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Svet_ta [14]
3 years ago
10

Which stimulus causes the roots of seedling to grow downard ?

Biology
1 answer:
Sergeu [11.5K]3 years ago
7 0
Gravity
Plant roots always grow downward because specialized cells in root caps detect and respond to gravity. This is an example of a tropism. A tropism is a turning toward or away from a stimulus in the environment. Growing toward gravity is called geotropism.
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