Cancer is often the result of activation of and the inactivation of genes.
a) oncogenes, tumor-suppressor genes, proto-oncogenes
b) oncogenes, proto-oncogenes, tumor-suppressor genes
c) proto-oncogenes, oncogenes, tumor-suppressor genes
d) proto-suppressor genes, suppressors, oncogenes

Option (C).

Explanation:

Cancer may be defined as the phenomena of the uncontrolled growth of the cell division and the cells require less nutrient medium to grow. Two main types of tumor are benign tumor and malignant tumor.

Proto- oncogenes generally regulates the growth and metabolism. The mutation may leads to the formation of proto-oncogenes to the oncogenes. These oncogenes are responsible for the formation of cancer. The main function of tumor suppressor gene is the suppressor inactivates the tumor genes. There suppression may result in the formation of tumor.

Thus, the correct answer is option (C).

i do not know and i have a 100 in this class

answer:

the water molecules are transferred from the roots to the stem or top parts of the tall tree because of important properties of water which are adhesion, cohesion and capillary action. cohesion is the property of water molecules keeps water molecules in a combined state by sharing of bonds between them at the atomic level. adhesion allows the interaction of water molecules with other substances or substrate. adhesion will cause the attachment of water molecules to the wall of the vessel (xylem) of the plant. capillary action occurs when the adhesive force to the vessel wall is stronger than the cohesive force between water molecules. capillary action mimics the transfer of water from a tube or pipe. in this way water utilizes its property to transfer water from down to top level of the plant.