The development of physics since about 1900 is called

An element that tends to los electrons during chemical reactions is probably

The process of melting ice is an example of

Cancer always originates from mutations in a stem cell.

Intrinsic factors causing mutations, such as errors in replication during cell division, are avoidable.

In order for a mutation to initiate cancer formation, which of the following conditions must exist?

Telomerase is expressed in normal, adult stem cells.

Which factor is MOST responsible for the decline in the death rate of cancer?

The type of tissue that lines, covers, and protects all internal and external surfaces in the body and is the source of most human cancers is mesenchymal tissue.

Resisting cell death is the behavioral hallmark caused by loss of tumor suppressor function.