Which of these scenarios is most similar to the Aztecs empire system of agriculture? A. A farmer observes the behavior of his animals to determine when to begin harvesting crops
B. A farmer plants many different crops in his field to make sure at least some of them thrive in the soil
C. A farmer plants some crops in his field every year because the soil had always supported them in the past
D. A farmer watches the suns patterns to determine the best time to plant his crops

Which at first gave the south an edge in the civil war? a. a better-equipped army b. the invention of ironclad ships c. the drafting of slaves into the army

According to the federal regulations, which of the following studies meets the definition of research with human subjects? a. a researcher uses the customs office’s passenger lists for ships bringing immigrants to the us between 1820-1845 to track the numbers of immigrants from certain ethnic groups. b. a researcher conducts a linguistic study of comments posted on a local public blog. c. a developmental psychologist videotapes interactions between groups of toddlers and their care givers to determine which intervention methods most effectively manage aggression. d. a researcher asks the director of a local free clinic about the number of patients in the last two years with newly diagnosed hiv/aids.

Describe at least three effects of the drug war in mexico.