¿Por qué en vez de estar formado por 60 billones de células, un árbol adulto no está conformado por pocas células más grandes?

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