Use the Following Information to Answer the Question

question 48

Multiple Choice

Use the following information to answer the question.
An elementary school science teacher decided to liven up the classroom with a saltwater aquarium. Knowing that saltwater 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 herbivorous gastropod varieties. Lastly, she added some vertebrates-a parrot fish and a clown fish. She arranged for daily feedings of copepods and feeder fish.
The bivalves started to die one by one; only the undamaged shells remained. To keep the remaining bivalves alive, the teacher would most likely need to remove the ________.

• A) sea anemones
• B) sea star
• C) gastropods
• D) ectoprocts

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Definitions:

Nominal Wage

The wage paid to workers measured in current monetary units, without taking inflation into account.

Price Level

The calculated average of current prices for all goods and services in the economic field.

Money Supply

The entire sum of cash, coins, and account balances in checking and savings that constitute the monetary assets in an economy at a specific time.

Real GDP

The total value of all goods and services produced by a country over a specific time period, adjusted for inflation, reflecting the actual productivity of an economy.