Sam came home from school with a cold caused by a virus and his sister, ana, caught it from him. sam got well and went back to school. a few days before ana got well, sam came down with a cold again. their mother said that ana had given the cold back to sam. how likely is it that their mother is correct, and what does it mean for ana's chances of getting sick again? 1)if sam only had a mild infection of the virus he might not have acquired immunity to it and could catch it again, as could ana if she had a mild infection. 2)sam could not get sick with the same virus again since he has acquired immunity to it, so he must have a different virus which ana could catch. 3)if sam's body did not store up enough antibodies to the virus he could get sick with it again, as could ana if the same thing happened to her. 4)sam could have picked up another virus at school as well as catching the same one from ana again, so ana could get sick again with either virus.
Answers: 1
Biology, 22.06.2019 00:10
Which would happen if more forests were cut down? a. the nitrogen cycle would be stopped b. nitrogen would be fixed by bacteria more quickly c. the amount of co2 in the atmosphere would increase d. fossil fuels would build up in the soil c the amount of co2 in the atmosphere would increase
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Biology, 22.06.2019 09:50
Which statement describes compounds a. compounds are made of one type of atom. b. compounds cannot be represented by models. c. compounds are represented by chemical formulas. d. compounds cannot be broken down into simpler forms.
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Biology, 22.06.2019 19:30
You are given an electron micrograph of a bacterial cell. in the micrograph you can clearly see three thin layers of different densities surrounding the cell. based on the micrograph, you can infer that this cell is and would appear after application of the gram stain procedure. gram-negative / pink gram-positive / purple gram-positive / pink gram-negative / purple
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Sam came home from school with a cold caused by a virus and his sister, ana, caught it from him. sam...
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