| | Draw a *systems* diagram to illustrate and *explain* why introduced (nonnative) *species* often do poorly and have a tendency to die out, as well as why they sometimes do very well and force out native *species*. *a, *b |

| | *a A1.8.A Analyze a problem situation and represent it mathematically. 7.2.E Represent proportional relationships using graphs, tables, and equations, and make connections among the representations. A1.3.B Represent a function with a symbolic expression, as a graph, in a table, and using words, and make connections among these representations. A1.2.B Recognize the multiple uses of variables, determine all possible values of variables that satisfy prescribed conditions, and evaluate algebraic expressions that involve variables. |

| | *b A1.6.B Make valid inferences and draw conclusions based on data. A1.7.D Solve an equation involving several variables by expressing one variable in terms of the others. |