01: 20
in double-blind studies neither the test subject or the researcher knows who was given the drug and who was given the
control. why are these studies effective for testing a drug that may elevate mood and relieve feelings of depression?

i believe the answer is snake.

what are the options

a ratio derived from the equality between two different units that can be used to convert from one unit to the other. information obtained from experiments, sometimes called experimental results. the part of the experiment that is affected by the independent variable.

i took a test for bio that had this question and these were the correct answers, not sure if this is any now lol

the nervous system and the muscular system work together.  

sweat reaches the surface of the skin and evaporates into the air.

muscles underneath the skin relax, causing hair on the skin to lay flat.