A Doctor Is Treating a Patient Who Has Some Form

question 4

Multiple Choice

A doctor is treating a patient who has some form of anemia. First, the doctor tries to give the patient extra vitamins that contain iron, to no effect. There is no evidence of lead poisoning. The doctor tries an injection of vitamin B₁₂, and the anemia is under control. What type of anemia did the patient have?

• A) iron-deficiency anemia
• B) sickle-cell anemia
• C) pernicious anemia
• D) hemorrhagic anemia

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Definitions:

Pyramid of Biomass

A depiction of the decreasing mass of organisms found as one ascends through the food chain.

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.