The ____ phylum has about 550 known living species of vascular, seed-bearing plants, the most among gymnosperms. Many of them have needlelike leaves with thick cuticles and sunken stomata, and are thus adapted to dry conditions.
A) Cycadophyta
B) Anthophyta
C) Gnetophyta
D) Coniferophyta
E) Ginkgophyta
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