Describe the movement of ions that causes an action potential to occur.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

When analyzing tree rings, what do scientists assume a thin ring indicates?

The idea that all living things are made up of cells is considered scientific law. this means the idea is an emerging scientific idea that has a logical explanation. has been tested with similar results at least twice. is supported by scientific consensus and a large amount of evidence. has been rejected only once by the scientific community