There are two ways of finding the root of a phylogenetic tree. The first is to include one or more sequences in the data set that are known to lie outside the diversity of the sequences of interest. These sequences are usually referred to as the 'outgroup'.For example, in the trees above, the pair of tips labelled 'virus9' and 'virus10' could be the outgroup allowing us to root the tree at the red circle.hese sequences are usually referred to as the 'outgroup'. For example, in the trees above, the pair of tips labelled 'virus9' and 'virus10' could be the outgroup allowing us to root the tree at the red circle.
The origin of the prefix anti- and its variant ant- is an ancient Greek word which meant âagainstâ or âopposite.â These prefixes appear in numerous English vocabulary words, such as antifreeze, antidote, antonym, and antacid.
The name Alexander is derived from the Greek á¼Î»Î­Î¾Î±Î½Î´ÏÎ¿Ï (AlÃ©xandros), meaning Defender of the people or Defending men and also, Protector of men, a compound of the verb á¼Î»Î­Î¾ÎµÎ¹Î½ alexein, to ward off, to avert, to defend and the noun á¼Î½Î®Ï anÄr, man (GEN á¼Î½Î´ÏÏÏ andros).