An imagined community is a concept developed by Benedict Anderson in his 1983 book Imagined Communities, to analyze nationalism. Anderson depicts a nation as a socially constructed community, imagined by the people who perceive themselves as part of that group.
Answer:
True
Explanation:
There are several types of cytokines used in cell signaling; interferons, interleukins, tumor necrotic factor, and chemokines. T helper cells mainly produce interleukins. When activated by Antigen-Presenting-cells, t-helper cells produce interleukins that activate B cells and is significant in their proliferation during an infection.
Answer: Important characteristics of antimicrobial drugs include low toxicity for human tissues. High toxicity against microbial cells. Do not cause serious side effects in humans. Stable and soluble in body tissues and fluids. All of the choices are correct.
Explanation:
<span>The geologic time scale is divided into periods, which are then divided into epochs, which are further divided into ages. For example, the time of the dinosaurs lasted 3 periods (Triassic, Jurassic, Cretaceous), each period had 3 epochs (late, early, middle), and each age fit into one of those. Many epochs have more than 1 age associated with them.
As for the basis for differentiating the eras, I'm not so sure. The only one I can say for sure is the end of the Cretaceous, which is when the dinosaurs suddenly became extinct due to a meteor impact. I think the divisions are based on significant, global-scale events that changed the world.
Sorry its so long but that the answer i think >:) ur welcome
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