Pituitary gland is called as master gland
Answer: the <span>Permian–Triassic extinction event ; {"end of the Permian era"} .
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Answer:
Most of the nitrogen oxides released in the U.S. due to human activity are from the burning of fossil fuels associated with transportation and industry. When fossil fuels are burned, they release nitrogen oxides into the atmosphere, which contribute to the formation of smog and acid rain.
Explanation: