An unrooted tree,linking three species,is shown above.Draw all possible unrooted tree conformations when a fourth species,D,is added to the tree.
Definitions:
Bones
The hard, dense connective tissue forming the structure of the skeleton of vertebrates, providing support and protection.
True Ribs
True ribs are the top seven pairs of ribs that are directly attached to the sternum through costal cartilages, providing protection to the thoracic cavity.
Vertebrae
The individual bones making up the vertebral column (spine) in humans and other vertebrates.
Ribs
The long curved bones which form the rib cage, providing protection to the thoracic organs.
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