Answer:
Kyanite is a major raw material for the mullite used in spark plugs and other refractory porcelains. A clear, deep blue variety is sometimes cut as a gemstone.
Explanation:
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Answer:
Fossil B is the same age as the index fossil.
Explanation:
TOO LATE BUSTER
They eat producers in order to survive
Answer:
The closed circulatory system considerably enhances the speed, precision, and efficiency of the circulation. The blood flows far more rapidly and it takes less time to circulate through the closed system and return to the heart.
