If you took a sample of magnetotactic bacteria from the northern hemisphere to the southern hemisphere, would you expect them to survive? a. both in the northern and in the southern hemispheres, the earth's field points down. so the bacteria are likely to survive. b. in the northern hemisphere, the vertical component of the earth's field points up, and in the southern hemisphere, it points down. so the bacteria are not likely to survive. c. in the northern hemisphere, the vertical component of the earth's field points down, and in the southern hemisphere, it points up. so the bacteria are not likely to survive. d. both in the northern and in the southern hemispheres, the earth's field points up. so the bacteria are likely to survive.