Which of the following is an example of an exothermic reaction? silt settling out of muddy water bubbles forming in soda photosynthesis fireworks

The cluster of developing cells from conception until birth is called an

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.

Drag each tile to the correct box. arrange the layers and faults from oldest to youngest.