Final answer:
The symbol 'Rx' means 'take thou' and is used on prescriptions. Pharmacists, with their knowledge in chemistry and biology, provide medications as prescribed.
Step-by-step explanation:
The phrase 'take thou' is an instruction typically seen on a prescription and is represented by the symbol Rx, which is used by doctors when prescribing medication. A pharmacist, who has extensive knowledge in both chemistry and biology, would understand this notation and provide the prescribed medication accordingly. This professional dispenses drugs and offers advice on their proper use, supporting the health of patients.