A Biologist Studied a Population of Squirrels for 15 Years

question 10

Multiple Choice

A biologist studied a population of squirrels for 15 years. During that time, the population was never fewer than 30 squirrels and never more than 45. Her data showed that over half of the squirrels born did not survive to reproduce, because of competition for food and predation. In a single generation, 90% of the squirrels that were born lived to reproduce, and the population increased to 80. Which inference(s) about this population might be True?

• A)The amount of available food may have increased.
• B)The number of predators may have decreased.
• C)The squirrels of subsequent generations should show greater levels of genetic variation than previous generations, because squirrels that would not have survived in the past will now survive.
• D) A and B only
• E)A, B, and C

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Definitions:

Percentage of Receivables Method

An accounting method used to estimate the amount of a company's accounts receivable that will not be collected.

Bad Debt Write-offs

The process of removing uncollectable accounts receivable from the accounting records, recognizing them as a loss.

Allowance Method

An accounting technique that estimates and records bad debts expense from credit sales.

Bad Debt Expense

An expense account representing accounts receivable that a company does not expect to collect and writes off as a loss.