The Following Questions Refer to the Paragraph Below

question 41

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.
-The clownfish readily swims among the tentacles of the sea anemones; the parrotfish avoids them. One hypothesis for the clownfish's apparent immunity is that they slowly build a tolerance to the sea anemone's toxin. A second hypothesis is that a chemical in the mucus that coats the clownfish prevents the nematocysts from being triggered. Which of the following graphs supports the second, but not the first, of these hypotheses?

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Definitions:

Spinach Enchiladas

A dish comprising tortillas rolled around a filling, typically of spinach and cheese, and covered with a chili pepper sauce.

Supply

Supply is the total amount of a product or service that is available to consumers at a given price range and time period.

Quantity Supplied

The amount of a good or service that producers are willing and able to sell at a given price over a specified period of time.

Cell Phones

Portable electronic devices used for mobile communication, including voice calls, text messaging, and internet access.