Many normal genes that have important functions in promoting cell growth and division sometimes acquire mutations that cause the products of these genes to have negative effects including the development of cancer. these genes (when not mutated) are called:

Proto oncogenes.

Explanation:

Proto oncogenes may be defined as the genes that play an important role in the cell functioning and its growth. The proto-oncgenes require enzymes and proteins that are normal for the other cells.

The main function of the proto oncogene is cell division. Any mutation or change in the proto oncogene results in the formation of oncogenes. These oncogenes are responsible for the formation of the cancer development in the individual.

Thus, the answer is proto oncogenes.

events in order:

1.       vishnu schist

2. zoroaster granite

3. bass limestone

4. hakatar   shale

5. igneous intrusion

6. shinumo quartzite

7. dox sandstone

8. tapeats limestone

9. bright angel shale

10. muav limestone

11. temple butte limestone

12. redwall limestone  

nonconformity

answer: the unkar group shows angular unconformity because the layers are turned at angle.

unconformity

answer: specifically the angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled. an angular unconformity occurs between the cambrian and precambrian rocks. the dox sandstone, shinumo quartzite, hakatar shale, and bass limestone have been filled.

disconformity

answer: the disconformities aremarked irregular lines between the sedimentaryrocks layers.