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Dr.Hugo designs an experiment to test the effectiveness of a new antidepressant.Half of the participants will receive the drug and half will receive a sugar pill,but neither the participants nor the researchers who administer the drug will know who is receiving the drug and who is receiving the sugar pill.What has Dr.Hugo designed
Soil Nutrients
Essential elements or compounds in the soil that support the growth and development of plants.
Rain Forest
Dense forests typically found in tropical regions, with high levels of biodiversity and rainfall.
Primary Limiting Factor
An environmental condition that most significantly restricts the growth, abundance, or distribution of an organism or a population.
Temperate Grasslands
Expansive areas of grassy fields found in regions with moderate temperatures throughout the year, often used for grazing and agriculture.
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