A scientist found a new species in a rain forest. The species was small and green in color. She examined one of its many cells and found that the celll has a nucleus but no cell wall. To which kingdom does this species most likely belong?

This species most likely belong to the animal kingdom, because it is multicellular with no cell wall.

Members of the kingdom Animalia are eukaryotes (organisms with true nucleus), multicellular and their cells do not have cell wall. If the cell had a cell wall, the specie could be a plant or fungi, but it does not have a cell wall so it is an animal. Animals exist in various sizes and colors and their cells contain many organelles that perform several functions that are important for their survival.

it also supports my hypothesis. if you rest first you can squeeze the clothespin more times. from the data i collected the average of the eight people concluded exercise makes your muscles more fatigued and less able to squeeze the clothespin compared to resting before squeezing.