Question

guppies are small freshwater fish. females of this species are typically dull in color. many males of this species are brightly colored, but some males of the species are also dull. scientists are studying the effect of predation on the color of male guppies. this graph shows the data collected from examining the males in a population of guppies over eight generations. no predators were present for generation 0, but an approximately constant number of predators was present for all other generations. based on the data, select the phrases from the menus to correctly complete the statement about the change in the guppy population over the eight generations. the percentage of the following male guppies increased: dull - colored brightly - colored

Explanation:

グラフを見ると、世代0から世代7まで、暗色の雄グッピーの割合が増加し、明るく色付いた雄グッピーの割合が減少しています。捕食者が現れた後の世代では、暗色の方が生存に有利であるため、暗色の雄グッピーの割合が増加したと考えられます。

Answer:

dull - colored