What is a simple definition of the white smoker? and how is it different from the black smoker?

Describe how alleles and genes are related

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

Which was most likely an effect on society that resulted from improvements in blood handling during world war i and world war ii?