Woese a. was involved in determining rrna sequences and proposed breaking eukaryotes into domains archaea and bacteria. b. proposed breaking prokaryotes into two groups and was involved in refining the gram stain for classification purposes. c. was involved in determining dna sequences and proposed breaking eukaryotes into domains archaea and bacteria. d. proposed breaking eukaryotes into domains archaea and bacteria and was involved in refining the gram stain for classification purposes. e. was involved in determining rrna sequences and proposed breaking prokaryotes into two groups.