When plants first colonized land, the space they occupied was two-dimensional: the surface of the land. Which adaptation allowed plants to occupy a three-dimensional environment?

Question

Quizplus · Accepted Answer

The vascular system, composed of xylem and phloem tissues, allowed plants to transport water and nutrients from the roots to other parts of the plant, and also to provide support for growth. This allowed plants to grow taller and branch out, occupying a three-dimensional environment. Double fertilization, seeds, and flowers are important adaptations for plants, but they did not directly enable plants to occupy a three-dimensional environment.

When Plants First Colonized Land, the Space They Occupied Was