Unformatted text preview: (c) gymnosperms (d) seedless vascular plants . (1 pt) 6. The demise of most seedless vascular plant species occurred (a) around 1000 years ago (b) as gymnosperms out-competed them in coastal wetlands (c) as mosses became dominant around 270 million years ago (d) when the large continent, Pangaea developed about 250 million years ago . (2 pts) 7. A major advantage that seed plants have over seedless plants that increases the chances of reproductive success is (a) freely-living male and female gametophytes (b) the presence of a vascular system (c) the protection of the gametophytes (d) the lack of any antheridia. (2 pts)...
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- Spring '08
- Biology, 1 pt, 2 pts, Fern, seedless vascular plant, vascular plant gametophytes