The introductory passage explains that Vibrio cholerae bacteria may benefit from being able to obtain genes from their prey. What would be the best way to test whether they can benefit within one week of exposure to prey with a gene that confers resistance to ampicillin, an antibiotic that is commonly used in microbiology laboratories

cancer   is   essentially   uncontrolled   mitosis   of specialized cells

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

before, trains worked using the steam engine. thus, it uses heat so it is crucial to apply heat balance. the steam engine absorbs energy during the stage of boiling water. so, this is the endothermic reaction. when the steam is used to work the piston, it has to release this energy through running the train. the excess energy is released as an exhaust to the chimney. this is the exothermic process because it releases energy to the surroundings.

geologic time scale (for gradpoint) =)