Microorganisms were probably restricted to the oceans and subsurface environments until
A. aquatic life brought them onto land.
B. chemoorganotrophy developed.
C. phototrophy evolved.
D. the ozone layer was made.
Answer:D
Microorganisms were probably restricted to the oceans and subsurface environments until
A. aquatic life brought them onto land. B. chemoorganotrophy developed. C. phototrophy evolved. D. the ozone layer was made.