A Biologist Studied a Population of Squirrels for 15 Years

question 40

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 both 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 parental generation of squirrels developed better eyesight due to improved diet; the subsequent squirrel generation inherited better eyesight.
• 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) Three of the statements above are correct.
• E) Two of the statements above are correct.

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Definitions:

Structural Reference

A method in spreadsheet applications that uses table names and column headings to refer to cells within a table, improving clarity.

Salary Column

In spreadsheets or databases, a column specifically designated for listing the salary amounts for individuals or positions.

Delete Field

The process of removing a column or attribute from a database table or data structure.

Worksheet Column

A vertical arrangement of cells in a spreadsheet or worksheet, usually labeled by letters at the top of the interface.