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frozen [14]
2 years ago
7

To study __________ possibility, the scientist uses two groups of people who are over 75 years of age and have mild memory loss.

The control group receives 100 pills that contain fish oil. The ________ group receives similar pills that don’t contain any active ingredients. These fake pills are called placebos.
Biology
1 answer:
Dafna11 [192]2 years ago
8 0

Answer:

-This/control

"To study this possibility, the scientist uses two groups of people who are over 75 years of age and have mild memory loss. The control group receives 100 pills that contain fish oil. The control group receives similar pills that don’t contain any active ingredients. These fake pills are called placebos."

Explanation:

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Dispersal helps different species to increase their range of places, thereby helping to increase their population size in different regions. Dispersal also helps to avoid crowding of diseases of a single location as species move to different locations.

<h3>What is dispersal?</h3>
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