Answer:
When penicillin was discovered by Alexander Fleming in 1928 it was a miracle drug that would permanently eradicate tuberculosis and many other bacteria causing disease but due to it's extensive use many bacteria especially tuberculosis become resistant to it.
Bacteria become resistance because they can make mutation in their genomes and make antibiotic resistant gene which they can transfer to other bacteria too.
So to slow down their evolution doctors now recommend antibiotic only when needed. Multiple antibiotics are given so that no bacteria survive for mutation. Human should discover new vaccines to decrease load on antibiotics which slows down the evolution of antibiotic resistance.
Answer:
As the name implies, sporting achievement require physical training to achieve achievement, while recreational sports have the same goal but are more intended as a means to improve physical fitness,
It depends on your age actually, gender, and level of physical activity that you get but for an adult is 2 cups a day. Children under the age of 18 are recommended to get at least 1.5 cups.
