What event is thought to have contributed to the evolution of eukaryotes?
a. global warming
b. glaciation
c. volcanic activity
d. oxygenation of the atmosphere
Answer: d. oxygenation of the atmosphere
What event is thought to have contributed to the evolution of eukaryotes?
a. global warming
b. glaciation
c. volcanic activity
d. oxygenation of the atmosphere
Answer: d. oxygenation of the atmosphere