Which of These Structures Would Most Likely Have Been Observed

question 19

Multiple Choice

Which of these structures would most likely have been observed in the common ancestor of chondrichthyans and osteichthyans?

• A) a mineralized, bony skeleton
• B) opercula
• C) a spiral valve intestine
• D) a swim bladder

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Definitions:

Accounting Profits

The net income of a company determined by subtracting total expenses from total revenues, according to generally accepted accounting principles.

Economic Profits

The difference between a firm's total revenue and its total costs, including both explicit and implicit costs, representing profit beyond the normal rate of return.

Opportunity Cost

The loss of potential gain from other alternatives when one particular alternative is chosen.

Savings Account

A deposit account held at a bank or other financial institution that provides principal security and a modest interest rate.