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Home Q & A Board Biology-Related Homework Help General Biology
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ceybe ceybe
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6 years ago
Because they are morphologically simple, Psilotophyta have traditionally been thought to be a basal group in the radiation of land plants. Molecular phylogenies have challenged this hypothesis and support the alternative hypothesis that
A) they are the sister group to the seed plants.
B) they represent a grade rather than a monophyletic group.
C) they have lost complex structures in this lineage.
D) they represent a lineage that forms a monophyletic group with Lycophyta.
Textbook 
Biological Science, Canadian Edition

Biological Science, Canadian Edition


Edition: 2nd
Authors:
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#1
6 years ago
C
Explanation:  C) The molecular phylogenies support the idea that instead of the simplicity of Psilotophyta being an ancestral state, it is a derived state. This means that this lineage has lost the complex structures present in related groups.
ceybe Author
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#2
6 years ago
Thanks for answering
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