If iodine were placed in the beaker what would you see immediately

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

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

Which would be the most useful source of evidence to support mcneill's contention?