So you have base to test the experiment on, otherwise if you use multiple samples you will have different starting values that will render incorrect results
Answer: by eating meat from animals...?
Explanation: Well lions do actually eat meat so whenever they eat meat I'm guessing they get whatever they need. I'm still learning so sorry if I am wrong.
umm... what substances
um sure u messed up with the question
Answer: Ionic bond
Explanation: Ionic bonding is a type of chemical bonding that involves the electrostatic attraction between oppositely charged ions, and is the primary interaction occurring in ionic compounds.