Meteorites from Space

Multiple Choice

Meteorites from space

A) carried cyanobacteria that provided Earth's first oxygen.
B) carried retroviruses from which DNA molecules have been synthesized in the lab.
C) show no chemical evidence of water on Mars.
D) contain purines, pyrimidines, sugars, and ten amino acids.
E) carried amino acids that were all l-amino acids, the predominant form found in Earth organisms.