How is the life cycle of seedless vascular plants different from the life cycle of nonvascular plants?

Seedless vascular plants have vascular tissue—xylem and phloem—and their dominant adult form is the sporophyte. Nonvascular plants also have a gametophyte stage, and seedless vascular plants still produce gametes; their sperm generally need water to reach the egg. A zygote forms only after fertilization, so A is the correct choice: the adult form has xylem and phloem.

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