19. Which of the following does not contribute to normal cells becoming cancerous?
a. The conversion of a proto-oncogene to an oncogene
b. Damage to a tumor-suppressor gene
C. The acquisition of an oncogene from a virus
d. One or more of the cell's genes being removed by a virus

15 ! come and answer! a(n) disease is caused by a pathogen and can spread among organisms. a infectious b noninfectious c toxic d contaminated

The hematodinium parasite becomes less of a problem for the blue crab when the crab is very young. fishing is thriving in the region. the crab moves to less salty water. a significant percentage of the population is impacted.

The spermists believed that: the male made the only hereditary contribution to the offspring the male and female traits were blended in the offspring the female made the only hereditary contribution to the offspring the male and the female made equal contributions to the next generation