The Following Questions Refer to the Description and Table 28

question 60

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
$$\begin{array} { l l } \text { Material } & \text { Specific Gravity } ( \mathrm { kg } / / \mathrm { m }^{3} ) \\\text { Pure water } & 1000 \\\text { Seawater } & 1026 \\\text { Hydrated silica } & 2250 \\\text { Liquid laminarin } & 1500 \\\text { Diatom oil } & 910\end{array}$$
-Green algae often differ from land plants in that some green algae

• A)are heterotrophs.
• B)are unicellular.
• C)have plastids.
• D)have alternation of generations.
• E)have cell walls containing cellulose.

Recognize behavior modification techniques as strategies for self-motivation.

Understand the significance of psychological hardiness and self-discipline in goal achievement.

Relate expectancy theory to self-motivation and the importance of skill-building.

Grasp the importance of self-discipline in working towards and achieving personal and professional goals.

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Definitions:

Research Polling

The process of collecting data and opinions from a sample of individuals to infer the preferences or behaviors of a larger population.

Hispanic Population

Refers to people in the United States who are from or have ancestors from Spanish-speaking countries, mainly in Latin America and Spain.

Cell Phones

Mobile telecommunication devices capable of making voice calls and accessing data services, including texting and internet browsing.

Gender Gap

The disparity between men and women in various aspects, such as pay, employment opportunities, political representation, and more.