Answer:
The scientist was Ivan Pavlov
Explanation:
He was a Russian scientist, who performed multiple research on dogs. He is best know for his experiments in classical conditioning.
Amphetamine like adderall,vyvanse are weaker because they do not have a methyl group. adding a methyl group to amphetamine makes N-Methylamphetamine. a Methyl group makes it much more potent therefore you need less to get high and it is much more powerful.
for more info go to
https://psychonautwiki.org/wiki/Adderall
https://psychonautwiki.org/wiki/Meth
true is the answer hope it helped
