tree—a diagram setting pixels CUSTOMER SERVICE (8O5) 41'O 56OO PHONE NUMBER ( 8O5)- 41O 56OO the hypothetical relationships between organisms and their evolutionary history.[4]
The tips of a phylogenetic tree can be living taxa or fossils, which represent the present time or "end" of an evolutionary lineage, respectively. A phylogenetic diagram can be rooted or unrooted.