What organelle do plant cells have that animal cells do not?
Animal cells don't have cell walls or chloroplasts.
Chloroplast is an organelle which is characteristic of plants. The other is Cell wall, although cell wall is not an organelle! But, cell wall is peculiar to plant cell and it is absent in animal cells. Another organelle which differentiates plant cells from animal cells is the vacoule. Vacoule is larger in plant cells than animal cells.
Vesicles are neither animal nor plant cells, but organelles that can be found in both plant and animal cells. An organelle is to a cell what an organ is to a human, so a vesicle is to a plant or animal cell what your stomach is to you. Plant cells feature a large central vacuole, while animal cells contain smaller vacuoles.