Answer:
keratin
Your nails are made of keratin
Keratin is a type of protein that forms the cells that make up the tissue in nails and other parts of your body.
Explanation:
Answer:
I think B and E.
Explanation:
Science is open to change.
Scientists conduct experiments based on testable hypotheses.
The kilometer is the independent, since it stays the same, and the increasing his exercise time is the dependent since that’s what’s changing
