Answer:
The concentration of a substance is the quantity of solute present in a given quantity of solution.
I don't really know but I pick b.have always been vestigial.
As I see it. Answers are all “A”
Answer:
The main job of cells is to make proteins for humans beings.
Explanation:
I am confused about your question so i answered it on my own view
mark me as brainliest if it helped you
