The Short Run Is

question 187

Multiple Choice

The short run is

• A) less than one year.
• B) the time frame in which all resources are fixed.
• C) the time frame in which some resources are fixed.
• D) the time frame in which output is fixed.
• E) a time frame short enough so that some costs are explicit costs.

---

Definitions:

Directional Selection

A mode of natural selection where an extreme phenotype is favored over other phenotypes, causing the allele frequency to shift over time.

Selection Differential

The difference in a particular trait between the selected individuals for breeding and the general population, driving evolutionary changes.

Narrow Sense Heritability

The proportion of phenotypic variance that can be attributed to additive genetic variance, important in the prediction of response to selection.

Body Height

A measurement of an individual from the bottom of the feet to the top of the head when standing upright.