I believe it's the precise control of the retention of <span>water and electrolyte.</span>
The deer population decreased drastically because there were so many hostile animals where the deer where. For instance the wolves went up, then down as the deer decreased. When the wolves were low, the deer increased in growth.
Answer:
It is a isotonic because in this solution there will be no change in osmotic pressure.
Hope it helps.....
B. cellular respiration only