During the Hadean Eon, life
A) could have existed and survived regardless of impacts
B) may have existed but probably could not have survived for long periods due to sterilizing impacts
C) probably survived and existed until the end of the Hadean eon after which it was destroyed
D) could not have existed at all
Question 2
Electromagnetic radiation of wavelength 200. nanometers is which type?
A) X-rays
B) ultraviolet
C) microwaves
D) AM radio
E) visible