Described one way that streamlined plays a role in your daily activities

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.

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

b is the answer and if you need further with anything message me

for a different answer set the answer would be because the oxygen in the water had depleted (apex)