De?ne bacterial transformation.
What will be an ideal response?
Plasmids carry new genes into bacteria.
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One strategy moths have for evading bats is
a. the ability to become invisible to the bat's echolocation signals. b. straight-line flight patterns. c. a periodic closed-wing free-fall before resuming an erratic flight pattern. d. an erratic flight pattern, but no instances of free-fall. e. flying primarily in the daylight hours.
Calories per unit volume of a food
What will be an ideal response?
Over 470,000 cases of cholera were reported in Haiti in the two years following the 2010 earthquake. Which of the following was the most likely mode of transmission?
A. mosquitoes B. aerosols C. contact D. contaminated water E. contaminated milk
Why is a drop in blood pressure potentially dangerous?
A. Once pressure drops, it can take hours to increase it again. B. Low blood pressure leads to gas bubbles in the blood that can cause a stroke or the "bends". C. If pressure is not high enough, blood vessels collapse and can become stuck closed. D. Active cells, like those in the brain, need a continuous supply of oxygen and nutrients.