Teaching HSSC TGT 2023 Mock Test (Latest Pattern) General Knowledge Geography (World Geography) Origin and evolution of Universe Solar system
Study the following statements regarding the evolution of the Earth and choose the correct alternative:
(A) The early atmosphere contained very little free oxygen.
(B) Earth's oceans were saturated with oxygen before oxygen began to flood the atmosphere.
1
Both (A) and (B) are true.
2
Both (A) and (B) are false.
3
(A) is true but (B) is false.
4
(A) is false but (B) is true.
5
Not Attempted