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:

Substitutability

The degree to which one good or service can be replaced by another in consumption or production, often influencing competition and pricing in markets.

Elasticity of Supply

A measure of how much the quantity supplied of a good or service changes in response to a change in price.

Factor of Production

Inputs used in the production of goods or services, typically categorized into land, labor, capital, and entrepreneurship.

Cross Elasticity of Demand

The ratio of the percentage change in quantity demanded of one good to the percentage change in the price of some other good. A positive coefficient indicates the two products are substitute goods; a negative coefficient indicates they are complementary goods.