Some Large Fish Allow Smaller Fish to Swim Inside of Their

question 115

Multiple Choice

Some large fish allow smaller fish to swim inside of their mouths without eating the smaller ones. The smaller fish get food for themselves from the larger fish's mouth and at the same time remove parasites from its teeth. This is an example of

• A) reciprocal altruism.
• B) kin selection.
• C) audience inhibition.
• D) the cost-reward model.

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Definitions:

Saving

The act of setting aside a portion of income for future use, typically in a bank account or other secure investment.

Disposable Income

Resources meant for household spending and saving once income tax obligations are settled.

APC

The average propensity to consume, which is the fraction of total income that is spent on consumption as opposed to being saved.

Saving

The portion of income not spent on consumption, often set aside for future investments or expenditures.