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Phylogeny of Plants

posted Oct 27, 2016, 8:06 AM by Marschal Fazio   [ updated Oct 27, 2016, 11:33 AM ]
 Taxon   
 Protected embryos True Roots Persistently Green Sporophyte   Vascular Cells Stomata
 Megaphylls
(true Leaves)
 Seeds
 Stonewort (outgroup) - - - - - -
 Liverwort + --
Pine tree  ++
Braken Fern  +
 Club moss ++
 Sphagnum moss
 Hornwort
 Sunflower
 The matrix above supplies data for seven land plants and an outgroup (an aquatic plant known as a stonewort). Each trait is scored as either present (+) or absent (-) in each of the plants. use this data matrix to reconstruct the phylogeny of land plants. 

  1. Which of these two taxon are most closely related? 
  2. Plants that produce seeds are known as seed plants. What is the sister group to the seed plants among these taxa? 
  3. Which two traits evolved along the same branch of your reconstructed phylogeny? 
  4. Are there any homoplasies in your reconstructed phylogeny?
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