If we eventually find life on Mars, we could tell if panspermia may have occurred between Mars and Earth if
A) the biochemistry of Martian life is very different than life on Earth
B) the biochemistry of Martian life is very similar to life on Earth
C) Martian life shows evidence for natural selection
D) Martian life is cellular

Question

Quizplus · Accepted Answer

If Martian life has biochemistry that is very similar to life on Earth, it may suggest that the two planets share a common origin of life through panspermia. If the biochemistry of Martian life is different from Earth, it may suggest independent origins of life on the two planets. Evidence for natural selection (C) and cellular structures (D) would be expected for any form of life, and do not provide specific information about the origin of that life.

If We Eventually Find Life on Mars, We Could Tell