Which of the Following Pieces of Evidence Would Best Demonstrate

question 56

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