It provides the approx. time that the organism was alive by comparing them to index fossils.
<span>Parathyroid Hormone (PTH) is a hormone that signals an increase in blood calcium (Ca2+) within into the bloodstream when below normal ranges. When blood calcium is within normal ranges Calcitonin is released from the thyroid to stop blood calcium from increasing thus maintaining equilibrium.</span>
Answer:
A
Explanation:
A because water needs to be evaporated first
tbh I'm torn between a and b
