Which macromolecule forms a double layer as the primary structure of cell membranes? a)fats b)oils c)phospholipids d)steroids

Which equation is used to calculate the magnetic force on a charge moving in a magnetic field

In general, characteristics that an organism survive and reproduce become more common over time. what mechanism of evolution causes this?

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