Which is the best definition of a phylogenetic tree?
a)a table of classification that is based only on physical characteristics
b)eight levels of taxonomic categories that are used to classify organisms
c)a branching chart that depicts evolutionary relationship among organisms
d)organisms organized based on structure and genetic comparisons

The correct answer is C. A branching chart, that depicts evolutionary relationship among organisms.

Phylogenetic tree is termed as branching diagram and shows evolutionary relationship which is among different biological species.

All phylogenetic tree indicates common ancestry. In phylogenetic tree it has nodes which are known as taxonomic unit and there are those which are internal and referred to as hypothetical taxonomic units.

In biology trees are used as phylogenetic systematics and as bioinformatics.

each of the 46 original chromosomes splits into two daughter chromosomes, so there are two sets of 46 daughter chromosomes that end up in each cell. human cells have 46 chromosomes. each chromosome consists of a pair of identical chromatids attached together by a structure called a centromere.