NASA has published a list of criteria for identifying fossil bacteria in samples from Mars, as part of a search for evidence of life.Which of the following is good evidence for the presence of bacterial cells?
A) Three-dimensional organization of cells in a starburst pattern
B) No evidence of water in the surrounding mineral
C) Cell size of 0.5 to 2 microns
D) Absence of carbon in the material
Correct Answer:
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