Figure 422 Diagram of a Food Web (Arrows Represent Energy Flow

question 48

Multiple Choice

Figure 42.2 Diagram of a food web (arrows represent energy flow and numbers represent species)
-If Figure 42.2 represents a terrestrial food web,the combined biomass of 3 + 4 would probably be

• A)greater than the biomass of 1.
• B)less than the biomass of 8.
• C)greater than the biomass of 2.
• D)less than the biomass of 1 + 2.
• E)less than the biomass of 6.

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Definitions:

Placebo Effect

The phenomenon that occurs in an experiment when a participant’s response to a treatment is due to his or her expectations about the treatment rather than to the treatment itself.

Sugar Pill

A placebo, often used in medical trials to test the efficacy of new drugs by comparing their effects to those of an inert pill.

Drowsy

A feeling of being sleepily tired and lethargic, not fully awake, often as a prelude to falling asleep.

Random Assignment

The process of selecting participants for experimental and control groups by using a chance procedure to guarantee that each participant has an equal probability of being assigned to any of the groups; a control for selection bias.