What type of growth allowed seed plants to grow into large trees?

Name: What type of growth allowed seed plants to grow into large trees?
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Quizplus · Accepted Answer

Secondary growth allows seed plants to increase in thickness or girth, which supports the development of large trees by adding structural support necessary for the plant to grow taller and wider. This growth is facilitated by the vascular cambium and cork cambium, which produce additional vascular tissue and bark, respectively.

What Type of Growth Allowed Seed Plants to Grow into Large