Refer to the Table Showing Several Prokaryote (Bacterial) Species (Labeled

Multiple Choice

Refer to the table showing several prokaryote (bacterial) species (labeled A-E) that have been sequenced, along with the findings of the genes they contain.(Note: "x" marks the species possessing a functional copy of the gene.) Gene 1 is essential for the synthesis of several amino acids.Gene 2 encodes a protein involved in strengthening the cell wall.Gene 3 produces an enzyme that breaks down methane.The functions of the other five genes are currently unknown. What type of study best characterizes what the researchers did?

A) Functional genomics
B) Metagenomics
C) Comparative genomics
D) Haplotype mapping
E) Microbiomics