Answer:
The ventricles of the heart have thicker muscular walls than the atria. This is because blood is pumped out of the heart at greater pressure from these chambers compared to the atria.
Explanation:
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Answer: D, Scientists cannot predict what other unintended effects large concentrations
of iron may have.
Explanation: just took quiz ap3x
The Ottomans were the first empire to use firearms and gunpowder.
Answer:
Troposphere
Explanation:
The troposphere is the lowest layer of the atmosphere.
