Answer:
A. a magnet
Explanation:
Iron fillings could be separated from sand using a magnet
Answer:
Hi, this is a super vague question, so its pretty confusing to answer. Could you please be a bit more specific?
If you are referring to chemistry, then how you tell "what is what" is by the molecular makeup of an element (Periodic table), and "how that..affects what", chemical reactions can occur between elements
Amino acid is not found in a nucleotide.
Chromosomes have genes that determine specific thing about a person (hair color, eye color, how tall or short a person is etc....).
