The Following Questions Refer to the Paragraph Below

question 50

Multiple Choice

The following questions refer to the paragraph below.
An elementary school science teacher decided to liven up the classroom with a salt-water aquarium. Knowing that salt-water aquaria can be quite a hassle, the teacher proceeded stepwise. First, the teacher conditioned the water. Next, the teacher decided to stock the tank with various marine invertebrates, including a polychaete, a siliceous sponge, several bivalves, a shrimp, several sea anemones of different types, a colonial hydra, a few coral species, an ectoproct, a sea star, and several gastropod varieties. Lastly, some vertebrates-a parrotfish and a clownfish-were added. She arranged for daily feedings of copepods and feeder fish.
-Parrotfish have mouths adapted to scrape algae off of coral, and can even munch on coral. The aquarium's corals rapidly dwindled; in their place were shards of

• A)chitin.
• B)calcium carbonate.
• C)silica.
• D)bone.
• E)chitin impregnated with calcium carbonate.

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Definitions:

Employer-Financed Health Insurance

A health coverage plan provided by an employer to their employees as part of the employment agreement and benefits package.

Income Taxes

Taxes levied by a government on individuals or entities based on their income or profits within a given tax period.

Payroll Taxes

Taxes imposed on employers or employees, and are usually calculated as a percentage of the salaries that employers pay their staff.

Demand And Supply Diagram

A graphical representation used to show the relationship between the demand for a product and its supply, illustrating equilibrium price and quantity.