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

What advantage does a crop that undergoes vegetative reproduction have over plants that start from the seed? 1points a they store nutrients. b they can travel farther. c they experience more genetic variation. d they only occur in high-resource environments.

During a fierce storm a large number of tall trees on an island are uprooted by the wind and die. most of the trees on the island are now short trees and produce seeds that grow into short trees. what concept is shown in this example? question 5 options: natural selection artificial selection genetic engineering gene splicing

An uncomfortable feeling in the ears when descending in an airplane is caused by changes in air pressure on the: a. inner ear b. middle ear c. eardrum d. hammer/anvil