in the new six-kingdom system of classification, are now divided into two separate kingdoms, and which form the basis for the three domain classification system.

bacteria

archaebacteria and eubacteria

Explanation:

In the new six-kingdom system of classification, are now divided into two separate kingdoms, and , which form the basis for the three domain classification system

phylogenetic tree is the tree of life or evolution tree. it shows the different branches of evolution. the sequence goes like tissues - coelom - backbone - endoskeleton - segmentation

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.