Solved

The Following Questions Refer to the Paragraph Below

question 71

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.
-One day, little Tommy (a student in an under-supervised class of 40 fifth graders) got the urge to pet Nemo (the clownfish) who was swimming among the waving petals of a pretty underwater "flower" that had a big hole in the midst of the petals. Tommy giggled upon finding that these petals were sticky feeling. A few hours later, Tommy was in the nurse's office with nausea and cramps. Microscopic examination of his fingers would probably have revealed the presence of

Definitions:

Pollution Emissions

Refers to the release of pollutants into the environment, which can come from various sources such as factories, vehicles, and agriculture.

Tradable Pollution Permits

Government-issued allowances that give the holder the right to emit a specific amount of pollutants; these permits can be bought and sold, creating a market for pollution control.

Emitted Emissions

The pollutants released into the environment as a byproduct of economic activity, such as manufacturing or transportation.

Mercury

A heavy, silvery d-block element that is the only metallic element that is liquid at standard conditions for temperature and pressure.