The Symbols +, -, and O Are to Be Used

question 14

Multiple Choice

The symbols +, -, and o are to be used to show the results of interactions between individuals and groups of individuals in the examples that follow. The symbol + denotes a positive interaction, - denotes a negative interaction, and o denotes where individuals are not affected by interacting. The first symbol refers to the first organism mentioned.
-What interactions exist between cellulose-digesting organisms in the gut of a termite and the termite?

• A) +/+
• B) +/o
• C) +/-
• D) o/o
• E) -/-

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Definitions:

Net Present Value

The difference between the present value of cash inflows and the present value of cash outflows over a period of time.

Interest Rate

The proportion of a loan that is charged as interest to the borrower, typically expressed as an annual percentage of the outstanding loan.

Discounting

The procedure used to calculate the present value of future income, which is inversely related to both the interest rate and the amount of time that passes before the funds are received.

Present Value

The current worth of a future sum of money or stream of cash flows, given a specified rate of return.