ASAP! I WILL MARK BRAINLIST What is the process of succession?  A. When one disturbance replaces another disturbance  B. When an ecosystem changes from one biome to another biome  C. When a community is replaced by another community  D. When a species changes from one niche to another niche

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.