I would say B ? Should be correct
<span> purines: adenine, guanine
pyrimidines: thymine, cytosine, uracil </span>
anaerobic respiration.
Due to anaerobic respiration, one by- product of this process is lactic acid which builds up in the muscles and causes the fatigue.
Thats the short answer, I don't know if you want more details such as using the equations of both types of respiration, etc.
Explanation:
In biology, homeostasis is the state of steady internal, physical, and chemical conditions maintained by living systems.This is the condition of optimal functioning for the organism and includes many variables, such as body temperature and fluid balance, being kept within certain pre-set limits (homeostatic range). Other variables include the pH of extracellular fluid, the concentrations of sodium, potassium and calcium ions, as well as that of the blood sugar level, and these need to be regulated despite changes in the environment, diet, or level of activity. Each of these variables is controlled by one or more regulators or homeostatic mechanisms, which together maintain life.
