Alexander Fleming observed a colony of mold that inhibited the growth of nearby bacteria. Which of the following was his hypothesis?
A. The mold used all of the nutrients so that the bacteria couldn’t grow.
B. The mold produced a substance that killed nearby bacteria.
C. The bacteria changed their DNA when growing near the mold.
D. The mold was dead.
Answer:B
Alexander Fleming observed a colony of mold that inhibited the growth of nearby bacteria. Which of the following was his hypothesis?
A. The mold used all of the nutrients so that the bacteria couldn’t grow. B. The mold produced a substance that killed nearby bacteria. C. The bacteria changed their DNA when growing near the mold. D. The mold was dead.