In a Study Designed to Test the Effects of a New

question 128

Multiple Choice

In a study designed to test the effects of a new drug developed to treat Alzheimer's disease,half the patients were given the actual drug while the other half of the patients were given a placebo (sugar pill) .In this study,the experimental group is

• A) the patients who show evidence of an improvement in their memory.
• B) the group who received the actual drug.
• C) the group who received the placebo.
• D) the patients who were not included in the study.

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Definitions:

Weirs

Low dams built across rivers to raise the level of water upstream or regulate its flow for purposes such as irrigation, fish trapping, and water diversion.

Fish Traps

Engineered structures placed in aquatic environments designed to trap fish or other aquatic animals.

Microliths

Small stone tools, typically made by prehistoric peoples, used as spear points or in other sharp implements.

Flint

A hard, sedimentary cryptocrystalline form of the mineral quartz, historically used to make tools and weapons due to its ability to be chipped into sharp edges.