D. All of the above are true.
The answer is iron. Research has shown an increase in serum iron concentreation in athletes and a concomitant decrease in magnesium ions. The increase in iron concentration is thought to be attributed to tissue injury from the strenuous physical activity. The decrease in magnesium is due to demand by the skeletal muscles.
A. It’s the thing you change and you’ll measure the E. coli growth
I believe they are stromal
A. It functions in the dispersal of the spores.
