Alexander Fleming Observed a Colony of Mold That Inhibited the Growth

question 37

Multiple Choice

Alexander Fleming observed a colony of mold that inhibited the growth of nearby bacteria. What was the hypothesis proposed by Fleming to explain this result?

• A) The bacteria changed their DNA when growing near the mold.
• B) The mold used all of the nutrients so that the bacteria couldnʹt grow.
• C) The mold produced a substance that killed nearby bacteria.
• D) The mold was dead.

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Definitions:

REM Sleep

A phase of sleep characterized by rapid eye movements, paralysis of major muscles, and vivid dreams, playing a critical role in emotional regulation and memory consolidation.

Beta Waves

Fast brain wave activity associated with alertness, concentration, and cognitive processes in the waking state.

Bodily Movement

Physical activities produced by the skeletal muscles that result in energy expenditure, often referred to in the context of physical exercise and health.

Slow-Wave Sleep

A deep phase of sleep characterized by slow brain waves, associated with physical and mental restoration.