Oncogenes are mutated forms of genes. Oncogenes can transform a cell into a tumor cell. Some tumor cells are
benign, while others are malignant. How does the
presence of an oncogene lead to the formation of a
tumor?

Why might surface mining be less risky for miners than underground mining? a. surface miners can become trapped in a collapsed mine. b. surface miners work in dusty, enclosed areas. c. surface miners work aboveground. d. surface miners use elevators to enter mines.

Which of the following is an example of this type of co-evolution

Which of these is true for bacteria because they are prokaryotic cells? a. they can engulf body cells in order to make memory cells. b. they must invade viruses in order to reproduce. c. they are much larger than eukaryotic body cells. d. they can reproduce on their own outside of other cells.