I believe that the cardiovascular system help in release of blood throughout the body :3
Answer:
The answer is B
The fleas in the container with only distilled water
Explanation:
Just took the test on Apex
It is C) Amylase is a catalyst that speeds up the chemical process of breaking down food molecules.
Lava is the liquid form of a rock, but i don't believe that it is a rock itself......
Answer:
Option A, Neither the researchers nor the study participants know who is receiving the drug and who is receiving the placebo.
Explanation:
In a double blind test, both the researcher and research participants are unaware of the exercise in a medical test . During the research active medication is given to some of the research participants making sure that researcher is unaware of that while observing all the participants. However, at the end of the experiment ,both the researcher and research participants get to know who has received the treatment.
Hence, option A is correct