The answer to this question is b, effect.
It suggest that any living abject has DNA. Even if the organ is not living it still consist of DNA because it doesn’t disappear after it dies
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.
Mutuaism
because they both benift from each other
