To Establish a Link Between a Specific Bacterium and a Skin

question 1

Multiple Choice

To establish a link between a specific bacterium and a skin disease, researchers have shown that the 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

Understand the concept of the marginal propensity to consume (MPC) and its calculation.

Comprehend the relationship between consumption, saving, and disposable income.

Identify the factors that affect consumption spending.

Learn about the marginal propensity to save (MPS) and its significance.

---

Definitions:

Net Income

The sum of income remaining after subtracting all costs and taxes from the total revenue.

Tax Returns

Documents filed with the government detailing income earned, tax payable, and other financial information, used to assess tax liabilities.

OAS Benefits

Monthly payments provided by the government to eligible individuals who are 65 years of age or older, as part of the Old Age Security program in Canada.

Population Density

A measure of the number of individuals living in a unit area, usually per square kilometer or mile, indicating how crowded an area is.