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The vaccine in a flu shot contains weakened flu viruses. how does a flu shot work with the immune system? a. it destroys lymphocytes. b. it destroys macrophages. c. it activates macrophages. d. it activates lymphocytes.
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Biology, 22.06.2019 05:50
Which of the organisms listed below performs nitrogen fixation? a. legumes b. plants c. bacteria d. fungi
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Biology, 22.06.2019 09:00
The picture shows a location in india that is very dry and arid. notice the tall mountains in the background; you can find high amounts of vegetation on the other side of the mountains. which statement is most likely true for this area?
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An independent variable is a. directly changed by the experimenter. b. manipulated by changes to the...
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