Astate agency has contacted you to do a scientific assessment of kudzu in a nature preserve in southern georgia. they are concerned about the effects of kudzu (the non-native invasive vine) on a small rare plant that grows on the forest floor in the preserve, but which is found nowhere else in the state. kudzu is only growing in the east side of the preserve because it hasn't yet had time to invade further. in order to assess the effects of kudzu on the rare plant, you set up the following experiment: site 1. on the east side of the park with the kudzu, you set up ten 1m x 1m plots on the forest floor. in each plot you count the number of individuals of the rare plant. site 2. on the west side of the park without the kudzu, you set up ten 1m x 1m plots of the forest floor. in each plot you count the number of individuals of the rare plant. in this experiment, site 2 is your: a) variable. b) control. c) replication. d) hypothesi

b) control

Explanation:

An experiment, you control all variables. All except one variable should be the same between groups. The only variable that will change between groups if the one that you want to test the effect of. In experiments, you will need two or more groups; one of the groups should be the control. In the control group, the variable that you are going to test won't be present.

A control group is a group from which you will compare the results of the treatment group.

A variable is a factor; it could be dependent or independent. Dependent variables are those that you will measure, and they depend from independent variables. Independent variables are those that you will control.

Replication refers to the ability to reproduce the experiment. But in an experiment, you will need replicas, which are the number of plots (in this case) that you will use to calculate the effect.

A hypothesis is a possible explanation for the observation.

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.

answer; behavioral neuroscience;