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OpenStudy (anonymous):

I need help please! Cycads and ginkgoes were important plants to the world's terrestrial ecosystems during the: Paleozoic Era Cenozoic Era Mesozoic Era Precambrian

OpenStudy (anonymous):

precambian

OpenStudy (anonymous):

thank you so very much!

OpenStudy (anonymous):

the name indicates bcoz these plants hasnt cambium tissues which are xylem and phloem

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