Why do adults have stem cells? A. They are responsible for maintenance and repair. B. They are left over from earlier development. C. They continue the growth of the body. D. They replace organs that are worn out.

Where is energy trapped inside the organelle chlorophyll

Match the functions to the cell types ? contraction and relaxation. conducting electrochemical signals fighting diseases carrying genetic material

Which plate boundary causes plates to collide forming mountain ranges, volcanoes, and island arcs? give an example of this type of plate boundary. 2. at which plate boundary do rifts and mid-oceans ridges form? give an example of this type of plate boundary. 3. at which plate boundary do plates slide past each other while moving in opposite directions? give an example of this type of boundary.