Answer: In the control room!
Explanation:
A large hole that opens into the ground is called a sink hole
Answer:
Cell Divide
Explanation:
When cells increase in numbers they go through a special process. This process makes them divide into to two exact copies of each other.
Answer:
Neither observer nor subjects know which subject receives the vaccine and which receives a placebo
Explanation:
In a double-blind study neither the participants nor the experimenters is aware of who is receiving a particular treatment.
Its used to prevent bias in research results from demand characteristics or the placebo effect
