To Establish a Link Between a Specific Bacterium and a Skin

question 21

Multiple Choice

To establish a link between a specific bacterium and a skin disease,researchers have shown that bacterium was present in sick persons but not in healthy individuals.They isolated the bacterium in a pure culture and demonstrated that experimental healthy animals injected with this culture became sick.What other experiment do researchers need to perform to be absolutely sure that the bacterium is responsible for the disease?

• A)Demonstrate that the bacterium belongs to the pathogenic lineage.
• B)Demonstrate that the bacterium is not able to live outside of humans or animals.
• C)Isolate bacterium from an infected sick animal and demonstrate that it is the same bacterium as the one used for infection.
• D)Demonstrate all of the above.
• E)No experiments need to be done,because there are enough data to establish that skin disease is caused by the investigated bacterium.

Recognize how different types of taxes and deductions impact economic and money income.

Understand the concept of double taxation particularly relating to savings and investments.

Identify taxes that are based on principles of equity and efficiency in economic contexts.

Understand how changes in asset values impact both economic and taxable income.

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Definitions:

Net Income

The total profit of a company after all expenses, including taxes and operating costs, have been subtracted from total revenues.

Operating Leverage

A measure of how revenue growth translates into growth in operating income, indicating the proportion of fixed versus variable costs a company has.

Degree of Operating Leverage

A financial ratio that measures the sensitivity of a company's earnings before interest and taxes (EBIT) to a percentage change in sales, indicating the impact of fixed costs on profits.

High-low Method

The high-low method is an accounting technique used to estimate the variable and fixed costs of a business based on the highest and lowest levels of activity.