Why are some sea stars clones of each other while others show differences?

Which level of consumer had access to the smallest apply of energy

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

You see a white marker with an orange circle and black lettering. what does this marker tell you