An experiment aboard a recent Space Shuttle mission exposed Salmonella typhimurium (read as: TIE-fee-muhr-EE-um) to a space environment. Which of the following resulted when the bacteria came back to Earth:
W) they were more virulent
X) they were less virulent
Y) they had about the same virulence
Z) they changed into a new but similar species of bacteria
✔️Answer:W) THEY WERE MORE VIRULENT
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