An average normal range is between 4,500 and 10,000 white blood cells per microliter
They are soluble. Often, they are of an appropriate polarity and size as well.
Answer:
C. natural selection
Explanation:
Natural selection is when the organisms that have the better adaptation so they survive. In this case, the green was the better adaptation so they lived.
They lack true tissues and organs and have no body symmetry. hope it helps