You are studying an invasive insect species in the USA. Understanding where invasive species comes from can help with management (e.g., importation of native natural enemies for biocontrol). The graph below shows output from a STRUCTURE analysis of 10 microsatellite markers in 50 individuals taken from the invasive US population, and the three native countries of origin, Spain, France, and Italy. A-1pt) How many genetic groups, or clusters, were identified in the analysis? Assuming you’ve completely sampled the native range of this insect, develop a hypothesis to explain the invasion into the US. Italy France U.S.A. Spain 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 2 3 45678 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1 Italy France U.S.A. Spain 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% 2 3 45678 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 1