Pollution in an ocean ecosystem has caused a significant drop in sea otter population. Within a year, scientists monitoring the ecosystem note that the sea
urchin population on which the otters feed has greatly increased. The prevalence of
sea urchins has caused the kelp and algae populations on which the urchins feed to
decrease. The scientists fear the urchins will also begin to overwhelm the ecosystem's fragile coral population. Which species is most likely the keystone
species in the ecosystem?

Algae
Coral
Sea star
Sea urchin

First idea: suddenly, women were leaving their homes to cycle and socialize on country roads and city streets. —wheels of change, sue macy second idea: it was not a stretch for some cyclists to see the possibility of a larger role for women in the world. —wheels of change, sue macy what type of graphic organizer would best represent the connection between these two ideas? 1) a t-chart that separates ideas into two different categories 2) a chronology that shows 3) a sequence of several events a cause-and-effect graphic that shows how one idea led to another 4)a problem-solution graphic that presents a problem and a solution to the problem