The Sphenophyta
A) consist of a single existent genus, the herbaceous Equisetum.
B) were a dominant part of the vegetation in the Carboniferous period, and included large trees.
C) have hygroscopic elaters that are analogous, rather than homologous, to the elaters of liverworts.
D) has a creeping, underground rhizome that produces upright stems.
E) All of the answers are correct.
Correct Answer:
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A) mature sporophyte is nutritionally
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A) naked.
B)
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