Alexander Fleming Observed a Colony of Mold That Inhibited the Growth

question 21

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 mold was dead.
• B) The bacteria changed their DNA when growing near the mold.
• C) The mold produced a substance that killed nearby bacteria.
• D) The mold used all of the nutrients so that the bacteria couldn't grow.

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Definitions:

Cash Flows

The cumulative sum of funds moving in and out of a company, particularly influencing its ability to cover short-term obligations.

Break-even Quantity

The number of units that must be sold to cover the total costs of production, resulting in neither profit nor loss.

Fixed Costs

Expenses that do not change with the level of output or sales, such as rent, salaries, and insurance, essential for budgeting and financial planning.

Marginal Costs

Marginal costs refer to the additional cost incurred by producing one more unit of a product or service.