Coral Animals

question 57

Multiple Choice

Coral animals

• A)are a diverse group of cnidarians often forming mutualistic symbiotic relationships with dinoflagellate algae.
• B)are predominantly photosynthetic, multicellular algae.
• C)can tolerate low oxygen and nutrient levels, and varying levels of salinity.
• D)can only survive in tropical waters 30oC and above.
• E)build coral reefs by glueing sand particles together.

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Definitions:

Benefit-Cost Perspective

A method of evaluating projects or decisions by comparing the benefits they will generate to the costs required to implement them.

NPV

Net Present Value (NPV) is a financial metric that calculates the difference between the present value of cash inflows and outflows over a period of time.

Present Value

The today's worth of a future sum or cash flows series, based on a predetermined rate of return.

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