In area cells, the checkpoint proteins are often abnormal, allowing damaged DNA to be replicated and passed to daughter cells. This is how area are copied from one cell to the next. If there is a mutation in a gene that normal controls growth, then the cell will not have normal area of growth. A cell with defective checkpoint proteins can result in cancer, the area growth of cells with mutated DNA.

Astudent sees several ants walking up a wall following the exact same trail that an ant took earlier. she wants to apply the scientific method to determine how the ants detected the trail. which of these steps would come first in her application of the scientific method? perform an experiment by cleaning the scent away from part of the trail. draw a conclusion that the ants follow a scent trail. make a prediction about what the ants will do after she cleans away part of the trail. hypothesize that the ants are following a scent trail that the first ant left.