The dependence of all living cells on ____ to survive strongly ...

[tingc95]

The dependence of all living cells on ____ to survive strongly suggests that simple, living molecules originated in the
  ocean.

 

a. fresh water
  b. saline water
  c. carbon dioxide
  d. oxygen
  e. methane

Question 2

Earths early atmosphere contained high concentrations of ____.
  a. oxygen and nitrogen
  b. carbon dioxide and oxygen
  c. oxygen and methane
  d. oxygen and ammonia
  e. carbon dioxide and nitrogen

[allisonblackmore]

Answer to Question 1

b

Answer to Question 2

e

[tingc95]

Thanks for the timely response, appreciate it

[CAPTAINAMERICA]

YES! Correct, THANKS for helping me on my review