Which would be an autotroph in a grassland ecosystem

prairie cordgrass

Explanation:

Spartina pectinata is a species of cordgrass known as prairie cordgrass, freshwater cordgrass, tall marshgrass, and sloughgrass. It is native to much of North America, including central and eastern Canada and most of the contiguous United States except for the southwestern and southeastern regions.

organisms that are both used in toothpaste as well as cause malaria are protista and monera.

i think its the first one