Using a microscope in the science lab, Jill observed two unknown cells: Cell 1 and Cell 2. Cell 1 she identified as a plant cell and Cell 2 as an animal cell. Her teacher told her she identified the cells correctly. What did Jill most likely observe to correctly identify the cells?
Cell 2 had a cell membrane and Cell 1 did not.
Cell 1 had a cell wall and Cell 2 did not.
Cell 2 had a chloroplast and Cell 1 did not.
Cell 1 had a nucleus and Cell 2 did not.