These lumps of ice can be as big as baseballs.

Explain how the number of similarities between the embryos from early stage to late stage is used as evidence of a common ancestry

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.

Why do we perceive objects as retaining their brightness under different lighting levels?