How is molecular biology contributing to the science of systematics?

Which system of classification is based on the evolutionary and genetic relationships of organisms?

Should more weight should be given to genetic data or to information derived from comparative anatomy (phenotypes) in regard to taxonomic classification?

for the cactus (eukarotic) and the e coli bacteria (prokarotic) i want you to: Classify them based on modern taxonomy, and write their scientific name in three different ways based on Linnaeus. Describe their dichotomous key and show how far they are in their taxonomyfrom each other and describe how they interact together in the ecosystem basedon what you studied. what is thier location on the phylogenetic tree as well as the clade for both