The Relationship Between the Yucca Plant and the Yucca Moth

question 89

Multiple Choice

The relationship between the yucca plant and the yucca moth that pollinates it is best described as

• A) commensalism.
• B) parasitism.
• C) predation.
• D) mutualism.
• E) all of these.

---

Definitions:

Wealth Effect

The change in spending that accompanies a change in perceived wealth, typically when home values or investment portfolios increase.

Induced Consumption

Describes consumer spending that increases when income increases and decreases when income decreases, directly related to the level of disposable income.

Average Propensity

The proportion of total income or revenue that is spent on a certain category of expenditures or savings.

Save

The process of setting aside a portion of current income for future use or investment.