A person who has only one copy of the sickle cell gene does not have the sickle cell disease. Is it True or False *

List two modern organisms that have pentameral symmetry

2. given that most biochemical (other than coal) rocks react with hydrochloric acid, what does that tell you about organisms?

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