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Chemistry 9 Online
OpenStudy (anonymous):

a corn seed is germinated in the dark. The root growns in a downward direcion. This shows the effect of: a. positive gravitropism b. negative gravitropism c. positive phototropism d. negative phototropism plz explain why you chose your answer thx :D

OpenStudy (vincent-lyon.fr):

Ask your question in the Biology group, you might end up with better answers. http://openstudy.com/study#/groups/biology

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