The Following Questions Refer to the Description and Table 28

question 59

Multiple Choice

The following questions refer to the description and Table 28.1 below.
Diatoms are encased in Petri-plate-like cases (valves) made of translucent hydrated silica whose thickness can be varied. The material used to store excess calories can also be varied. At certain times, diatoms store excess calories in the form of the liquid polysaccharide, laminarin, and at other times, as oil. Below are data concerning the density (specific gravity) of various components of diatoms, and of their environment.
Table 28.1: Specific Gravities of Materials Relevant to Diatoms
$$\begin{array} { l l } \text { Material } & \text { Specific Gravity } ( \mathrm { kg } / / \mathrm { m }^{3} ) \\\text { Pure water } & 1000 \\\text { Seawater } & 1026 \\\text { Hydrated silica } & 2250 \\\text { Liquid laminarin } & 1500 \\\text { Diatom oil } & 910\end{array}$$
-You are given the task of designing an aerobic, mixotrophic protist that can perform photosynthesis in fairly deep water (e.g., 250 m deep) , and can also crawl about and engulf small particles. With which two of these structures would you provide your protist?
1) hydrogenosome
2) apicoplast
3) pseudopods
4) chloroplast from red alga
5) chloroplast from green alga

• A)1 and 2
• B)2 and 3
• C)2 and 4
• D)3 and 4
• E)4 and 5

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Definitions:

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A precursor form of angiotensin that is converted by angiotensin-converting enzyme (ACE) into angiotensin II, a potent vasoconstrictor involved in blood pressure regulation.

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A classification of drugs considered to have a lower potential for abuse compared to Schedule III drugs, but can lead to physical or psychological dependence.

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A drug or chemical whose manufacture, possession, or use is regulated by a government due to its potential for abuse or addiction.

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Protein structures that allow the passage of potassium ions across cell membranes, crucial for various physiological processes.