In Coral Reefs, the Cells of the Cylindrical Coral Polyp

question 229

Multiple Choice

In coral reefs, the cells of the cylindrical coral polyp contain single-celled photosynthetic algae, or zooxanthellae.Coral polyps filter organic material from water and metabolize it, forming carbon dioxide and nitrogenous wastes that zooxanthellae use in photosynthesis.The oxygen and sugars they form in turn are used by coral polyps and dinoflagellates for metabolism.Many corals cannot feed successfully when they lose their zooxanthellae, but zooxanthellae can usually grow and reproduce outside of the corals.For zooxanthellae, this interaction is _______; for corals, it is _______.

• A) commensalism; mutualism
• B) mutualism; commensalism
• C) obligate mutualism; facultative mutualism
• D) facultative mutualism; obligate mutualism
• E) facultative mutualism; facultative mutualism

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Definitions:

Net Loss

The amount by which expenses exceed revenues for a specific period, indicating a decrease in the owner's equity.

Straight-Line Depreciation

A method of calculating the depreciation of an asset by evenly spreading its cost over the expected useful life.

Residual Value

The estimated salvage value or end-of-useful-life value of an asset after depreciation has been fully applied.

Balance Sheet

A financial statement that displays a company's assets, liabilities, and shareholders' equity at a specific point in time, giving a snapshot of its financial condition.