Which of the Following Pieces of Evidence Would Best Demonstrate

Multiple Choice

Which of the following pieces of evidence would best demonstrate that a bacterium found on an asteroid originated in outer space?

A) the presence of volcanic ash on the outside of the bacterial cell
B) the absence of common gases found in Earth's atmosphere
C) the presence of right-handed amino acids in the bacterium's proteins
D) the absence of hydrogen bonds between water molecules in the bacterial cell