The answer would be C. Hope this helps buddy!!
Answer:
"You have to believe the exercise works before you try it" would be the pseudoscientific claim.
Professionals that study and make predictions about human population are called demographers.
Answer:
The correct answer is A.
Explanation:
A mutagen changes the level of mutations that occur in the DNA either by affecting it physically or chemically. This helps researchers create different organisms with altered phenotypes according to what the research needs so that the genes can be investigated further under a controlled environment.
So the answer is A.
I hope this helps.