Explanation:
Determining a substance's physical or chemical identity. What are the two main requirements for identification? The adoption of testing procedures that give characteristic results for specific standard materials and the number and type of tests needed to identify a substance to exclude all other substances.
The answer is actually "to prepare for special medical needs' I took the test
Substrate
activate site
product
The molecules in a solid object are packed together, meaning that they are closely together and can’t move freely
