Which describes a way in which phosphorus may enter into the phosphorus cycle? Earthquakes release phosphorus. Phosphorus is carried in the rain that was evaporated from lakes. Human use of fertilizers release phosphorus into the groundwater. Phosphorus is transpired from the leaves of plants.

Which of the following is an advantage of using embryonic stem cells in medical research? a. the use of embryonic stem cells is much less expensive than the use of adult stem cells. o b. no living tissue is damaged when scientists use embryonic stem cells. o c. embryonic stem cells are able to differentiate into a wider range of cells than adult stem cells. d. there is no controversy surrounding the use of embryonic stem cells.