) What kind of approach to phylogeny reconstruction is ribosomal RNA sequencing: cladistic or phenetic

cladistics

Explanation:

Cladistics is a phylogenetic approach used to classify groups of organisms based on shared derived characteristics (synapomorphies) that are not present in distant ancestors. Cladistics describes evolutionary relationships between organisms. Ribosomal RNA genes such as, for example, 5S ribosomal RNA, are appropriate for phylogenetic (cladistic) analyses because they are evolutionarily conserved between related species. Using ribosomal RNA genes, it is possible to trace evolutionary relationships ranging from kingdom level to genus. Unlike cladistics, phenetics is a method used to classify organisms based on the degree of similarity between them (usually by using external and/or morphological/observable phenotypic traits), regardless of their evolutionary relationships.

i believe the answer would be b. hope it : )