Erwin and Scott Used an Insecticidal Fog to Knock Down

question 24

Multiple Choice

Erwin and Scott used an insecticidal fog to knock down insects from the top section of a L. seemannii tree. The researchers identified over 900 species of beetles among the individuals that fell. Erwin also projected that this entire tree from top to bottom is host to about 600 arthropod species that are unique to this tree species and not found on any other tree species. There are approximately 50,000 species of tropical trees. Although it could not be entirely accurate, what would be the best way to estimate the total number of arthropod species?

• A) Estimate the species density and then multiply by 50,000.
• B) Multiply 600 by 50,000.
• C) Multiply 50,000 by 900.
• D) Add 900 to 600, and then multiply by 50,000.

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Definitions:

Past Service Costs

Costs related to pension plan benefits earned by employees in prior periods, which are recognized in the current period due to plan amendments or changes.

Actuarial Gains and Losses

Gains or losses that arise from the adjustment of assumptions or the application of actuarial models differently over time in evaluating a company's pension liabilities.

Projected Benefit Obligation

Represents an estimate of the total amount to be paid to participants in a defined benefit pension plan, based on employees' service and salary history.

Prior Service Cost

The cost associated with retroactive benefits granted in a pension plan amendment, recognized over the service lives of affected employees.