Q6.4. You are studying a population of wild coyotes and notice that every three years there is an epidemic of a bacterial disease. Which of the following is the most likely explanation for this periodic cycling of the disease?
O New coyotes, which are susceptible to the disease, are continuously born into the population
Coyotes are dying from other causes over time.
During an outbreak, the proportion of coyotes who are infected slowly falls as they recover.
O Coyotes from other populations who have already been infected and recovered from the disease immigrate into the study
population
Submit

americans began to notice growing differences between the northern and southern sections of the country. there were more people living in cities in the north, which made it more urban. more people lived on farms in the south, which made it more rural. while many people were farmers in the northern states, there were now other ways to make a living, such as working in mechanical cotton gins factories manufacturing cloth, tools and other goods. people in the north supported high tariffs on goods imported from europe because the extra cost encouraged people to “buy american” instead. in the southern states, planters did not like tariffs because they sold most of their production to europe and bought their tools from there as well. southerners believed the protective tariff was something that only northern factory owners keep their profits high. so the southern politicians came up with an idea. they would opt out. they would simply ignore the protective tariff. it was ‘null and void’ in south carolina. the state would not collect the taxes on goods imported into south carolina, no matter what the president said they had to do. this decision led to the nullification crisis.