Most of the oxygen carried by blood is bound to hemoglobin an iron containing protein which also gives red blood cells their distinctive red colour
I would have to say (D.) if it's been 150 years.
Matter is anything that has mass. everything has matter, even the air.
Above a pH of 7, pepsin becomes irreversibly denatured. Pepsin was the first enzyme to ever be discovered, and it was discovered by <span>Theodor Schwann.</span>
Pure water is very close to a pH of 7. The Great Salt Lake (from what I've read about) can range from 8.2 to 7.7 in different areas. Saliva is between 6.5 and 7.5. And ammonia has a pH of 11.
So the items that have a pH between 5 and 8 are pure water, saliva, and possibly the Great Salt Lake.
