Answer:
Explanation: Osteoclasts are responsible for resorbing bone matrix and releasing key minerals, including calcium, back into the bloodstream. They are stimulated by parathyroid hormone when blood calcium levels are low.
Explanation:
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Answer: B
Explanation: because it adapt to its environment to survive
Answer:
Flask 2 and 3
Explanation:
They have living fish, and all living things do cellular respiration, unless they are plants and do photosynthesis, or they do not have oxygen and do fermentation.