Barnacles Are Crustaceans That Attach Themselves to Rocks, Shells, or Other

question 39

Multiple Choice

Barnacles are crustaceans that attach themselves to rocks, shells, or other objects in marine habitats.An ecologist who wants to estimate the population of a species of barnacle living along the mid-Atlantic coast would most likely

• A) send a team of marine biologists to count every individual of the species.
• B) count all individuals of a local sample of the species and check back at given intervals to see if the number changes.
• C) perform DNA analysis on a sample group to determine how many unique individuals there might be in the overall population.
• D) capture, mark, and release a number of individuals at the beginning and end of a specific period, then use the mark-recapture equation to estimate the total population size.
• E) count individuals within quadrats at selected areas throughout the barnacles' range and extrapolate the results to the whole population.

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Definitions:

Opportunity Cost

The cost of forgoing the next best alternative when making a decision, representing the benefits that could have been obtained by taking an alternative action.

Variable Cost

Costs that change in proportion to the level of activity or volume of production, such as raw materials or sales commissions.

Prime Cost

The combined costs of direct materials and direct labor that are directly involved in the manufacturing of a product.

Direct Labor

The wages and salaries of employees who are directly involved in the production of goods or services.