Multiple Choice
Which of these gases was absent in the early Earth atmosphere at the time life first appeared?
A) nitrogen
B) water vapor
C) carbon dioxide
D) oxygen
Correct Answer:
Verified
Correct Answer:
Verified
Related Questions
Q51: Life first evolved in and the earliest
Q52: Early mammals differed from reptiles in many
Q53: Which group of animals is the most
Q54: Some of the more advanced organisms in
Q55: A major event in the Precambrian era
Q57: Laboratory experiments suggest that many of the
Q58: List three characteristics of all non-ape primates,and
Q59: Before the development of photosynthesis and as
Q60: Refer to the figure below, and then
Q61: Photosynthesis was first performed by bacteria about