If You Add Is Null as the Criterion for the Advisor

question 66

Multiple Choice

If you add Is Null as the criterion for the Advisor field in the Students table,what are the results?

• A) Advisors without students
• B) Students with advisors
• C) Students with more than one advisor
• D) Students without advisors

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Definitions:

Pyramid of Energy

A graphical representation that shows the flow of energy at different trophic levels in an ecosystem, with the largest amount of energy at the base and decreasing amounts as you move up.

Pyramid of Numbers

A graphical representation that shows the number of organisms at each trophic level in an ecosystem.

Biological Magnification

The increased concentration of toxic chemicals, such as PCBs, heavy metals, and certain pesticides, in the tissues of organisms at higher trophic levels in food webs.

Bioconcentration

The accumulation of a substance in the tissues of living organisms at higher concentrations than in the surrounding environment.