EXPALNATION When adjusting the ammount of oxygen the fooodwill be preserverd longer, this happens when you cutt an apple it starts to turn brown.
Dairy and meat
hope it helps
A seizure can be a sign of heart attack
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.
Reaction time is the answer
