Physical change only change the appearances of a substance, not it’s chemical composition. Chemical changes cause an entirely new substance with new chemical formula.
To understand the phenomenon of biological cell
To understand which principal occurs
To know the whose are reactant and what makes product
Hope for brainliest mark
Its D, im pretty sure theres not starch or acid in our DNA
Hello There!
It was a Greek astronomer called Aristarchus of Samos.
Hope This Helps You!
Good Luck :)
- Hannah ❤<span />
