The atmosphere of the early earth is thought to have contained carbon dioxide, water, oxygen, nitrogen, and hydrogen carbon dioxide, water, carbon monoxide, sulfur, and nitrogen water, carbon monoxide, hydrogen, oxygen, and nitric oxide water, methane, ammonia, nitrogen, carbon dioxide, and hydrogen

his research revealed two genetically different groups of prokaryotes, which justified splitting kingdom monera into two kingdoms. the genetic and cellular differences were so great, that these two kingdoms were eventually placed into different domains in the current three-domain system.

b exhibiting favoritism toward the kikuyu people.