Answer:
When the calcium level is high in the bloodstream, the thyroid gland releases calcitonin. Calcitonin slows down the activity of the osteoclasts found in bone. This decreases blood calcium levels. When calcium levels decrease, this stimulates the parathyroid gland to release parathyroid hormone.
Answer:
water molecules are cohesive due to hydrogen bonding.
Explanation:
B is your answer. God Bless hope this helps
Darwins proposed theory is the survival of the fittest.