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Middle lamella (p. 2)
Gymnosperm
Naked seed, 700 species are known with conifers as the largest group of gymnosperm (p. 2)
Angiosperm
Vessel seed, abundant during the Cretaceous period, about 100 million years ago. Now with 250,000 species are known, they dominate the landscape. The major innovation of the angiosperms is the flower; hence they are referred to as flowering plants (p. 2)
At the nodes, axillary buds contain
the apical meristems for branch shoots.