Explain why the changes seen in the petri dishes support the statement that cells are the building blocks of life.

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

How do living things obtain phosphorus

List do people affect the environment