Ididn't understand this topic and im running out of time to turn it in

1.Taxonomy is the science of naming, describing and classifying organisms and includes all plants, animals and microorganisms of the world. Using morphological, behavioural, genetic and biochemical observations, taxonomists identify, describe and arrange species into classifications. It organizes knowledge by using a controlled vocabulary to make it easier to find related information. 

2. There is the Archaea, the Bacteria, and the Eukarya. Archaea organisms are different from the other domains in that many are extremophiles, meaning they can live in intense environments with high temperature, high acid, and high salt levels. The Bacteria and Archaea are made up entirely of microorganisms; the Eukarya contains plants, animals, and microorganisms such as fungi and protists. The Bacteria and Archaea have been grouped together and called Prokaryotes because of their lack of a nucleus, but the Archaea are more closely related to the Eukaryotes than to the Bacteria. 

1. taxonomy is the science of defining and naming groups of biological organisms on the basis of shared characteristics.

2. -Archaeans

   -Bacteria

   -Eukaryote

is called echinoderms

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.