TLS Online TPP Program

#Question id: 40513


Consider the following statements about primordial Earth:
1. Atmosphere was reducing
2. UV radiation was intense
3. Ozone shield was present
4. Volcanic gases dominated

#Environmental Science
  1.  1, 2, 4
  2.  2 and 3 only
  3.  1 and 3 only
  4. 1,2,3 and 4