Primary and secondary succession are different from each other because secondary succession has what at the start?

What field of science did harry hess study?

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 processes would you expect to be key in the production of yogurt ?