Which portion of the continental margin begins where the continental shelf ends ?

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

What organ is the first to receive nutrients that have been absorbed from the digestive tract?

What are the proteins in connectivity tissues of your foot examples of?