Individual strata such as those shown here are formed over long periods of time due to what process?

What are genotypes? what are phenotypes?

Which of the following is a macronutrient? carbohydrates lipids amino acids all of the above

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