You Are Given Five Test Tubes, Each Containing an Unknown

question 42

Multiple Choice

You are given five test tubes, each containing an unknown protist, and your task is to read the following description and match these five protists to the correct test tube.
In test tube 1, you observe an organism feeding. Your sketch of the organism looks very similar to Figure 28.1. When light, especially red and blue light, is shone on the tubes, oxygen bubbles accumulate on the inside of test tubes 2 and 3. Chemical analysis of test tube 3 indicates the presence of substantial amounts of silica. Chemical analysis of test tube 2 indicates the presence of a chemical that is toxic to fish and humans. Microscopic analysis of organisms in test tubes 2, 4, and 5 reveals the presence of permanent, membrane-bounded sacs just under the plasma membrane. Microscopic analysis of organisms in test tube 4 reveals the presence of an apicoplast in each. Microscopic analysis of the contents in test tube 5 reveals the presence of one large nucleus and several small nuclei in each organism.

Figure 28.1
-Test tube 5 contains

• A) Paramecium.
• B) Navicula (diatom).
• C) Pfiesteria (dinoflagellate).
• D) Entamoeba.
• E) Plasmodium.

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Definitions:

Money Supply

The aggregate value of financial assets existing in an economy at a certain time.

Economic Growth

An increase in the amount of goods and services produced per head of the population over a period of time, often measured as the percentage increase in real GDP.

Tax Rates

The percentage at which an individual or corporation is taxed, which can vary depending on income level, type of good or service, and other factors.

Laffer Curve

An economic theory suggesting there exists an optimal tax rate that maximizes government revenue without discouraging people from working or investing.