Nearly all of the oxygen carried by blood is bound to an iron-containing protein that gives red blood cells their color.

If a robot fixed another robot is it a engineer or doctor?

This is one of the five kingdoms in the older biological succession. organisms in this kingdom are prokaryotic

When new rock is added to an oceanic ridge, the magnetized strips on either side of the ridge are evidence of sea-floor spreading. this is because the rocks on the two sides of the ridge o are equal in width and in polarity are polar opposites oare magnetized vary in width but are equal in polarity