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:

Self-Efficacy

An individual's belief in their own ability to succeed in specific situations or accomplish tasks.

Gender

The range of characteristics pertaining to, and differentiating between, masculinity and femininity, often based on social, cultural, and psychological aspects.

Physical Appearance

The outward phenotype or look of human beings, including features such as body shape, skin color, hair, and facial features.

Attentional Process

The cognitive process involving the selective concentration on one aspect of the environment while ignoring others.