A—C—T—G—G—A—T
A.
A—T—C—G—A—T
B.
A—C—T—C—C—G—G
C.
A—G—G—A—T
D.
A—C—T—A—G—A—T
Line them up:
A—C—T—G—G—A—T
A—T—C—G—A—T
A—C—T—C—C—G—G
A—G—G—A—T
A—C—T—A—G—A—T
Answer=C
Answer:
The atmosphere has a much greater percentage of oxygen now that it did before. Cyanobacteria is the organism that is largely responsible for this change.
Explanation: