You Are Given Four Test Tubes, Each Containing an Unknown

question 27

Multiple Choice

You are given four test tubes, each containing an unknown protist, and your task is to read the following description and match these four protists to the correct test tube.
When light, especially red and blue light, is shone on the tubes, oxygen bubbles accumulate on the inside of test tubes 1 and 2. Chemical analysis of test tube 1 indicates the presence of a chemical that is toxic to fish and humans. Chemical analysis of test tube 2 indicates the presence of substantial amounts of silica. Microscopic analysis of organisms in test tubes 1, 3, and 4 reveals the presence of permanent, membrane-bounded sacs just under the plasma membrane. Microscopic analysis of organisms in test tube 3 reveals the presence of an apicoplast in each. Microscopic analysis of the contents in test tube 4 reveals the presence of one large nucleus and one small nucleus in each organism.
Test tube 4 contains ________.

• A) Paramecium
• B) Pfiesteria (dinoflagellate)
• C) Entamoeba
• D) Plasmodium

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Definitions:

Increase

Increase refers to the action of becoming larger or greater in size, number, value, or amount.

Standard Error

A statistical measure that describes the accuracy with which a sample distribution represents a population, specifically the standard deviation of the sampling distribution of a statistic.

Independent Variables

Variables in an experiment or model that are manipulated or classified by the researcher to observe their effect on the dependent variable(s).

Squared Differences

The result of squaring the difference between two values, often used in statistical calculations to measure variance.