Cervical cancer is caused by severe abnormal changes in the cells of the cervix. Most precancerous or cancerous cell changes occur in the cervix at the transformation zone, because these cells normally undergo constant change.
A balk in baseball is any action by the pitcher that violates the balk rule, which restricts the actions of the pitcher when there is at least one runner on base. The purpose of the balk rule is to protect the runner or runners from being deceived by the pitcher.
Definition of balk. 1  transitive verb. 2  1 archaic : to pass over or by â¦ such an age as ours balks no expense â¦ â William Cowper. 3  2 : to check or stop by or as if by an obstacle : block â¦ had neither been balked nor been frightened â¦ â Francis Hackett. 4  intransitive verb.