in the evolutionary history of plants was the development of the seed. Plants that evolved
vascular tissue but do not have seeds are theseedless vascular plants. The final major
evolutionary event in the Plant Kingdom was the evolution of flowers and fruits. Plants with
vascular tissue and seeds but without flowers are thegymnosperms.The plants that have
all these features and also fruits and flowers are theangiosperms. These four groups are
the focus of the next two lessons.
Figure 10.6: The plant kingdom contains a diversity of organisms. Note thatVolvoxin the
upper left is a protist, not a plant. ( 9 )