Examlex
Natural selection acts on individual __________,not on individual genes.
Step-variable
Costs that remain fixed over small ranges of production or activity levels but can change with larger shifts in activity.
Mixed
A category that includes a combination of various elements or types.
Variable
An element, feature, or factor that is liable to vary or change.
Fixed
Refers to costs or expenses that do not change in proportion to the level of activity or production volume, such as rent or salaries.
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