Use the Following Information to Answer the Question

question 49

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.
Normally, the clown fish readily swims among the tentacles of the sea anemones; the parrot fish avoids them. One hypothesis for the clown fish'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 clown fish prevents the nematocysts from being triggered. Which of the following graphs supports the first, but not the second, of these hypotheses?

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Definitions:

Circumstantial Evidence

Testimony not based on actual observation or personal knowledge; evidence that leads one to infer the existence of other facts.

Assault and Battery

Legal terms where "assault" refers to the threat of harm, and "battery" to the actual physical impact on another person.

Fair Comment

A defence available when defamatory statements are made about public figures or works put before the public.

Methane Gas

A colorless, odorless, flammable gas that is the main component of natural gas and a potent greenhouse gas.