Which pair shows compounds with the same radical

The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.

Most animal cells membranes have proteins that pump ions out of the cell and potassium ions into the cell

How does photosynthesis show the conservation of mass and energy?