How does mitosis in plant cells differ from that in animal cells?         a. plant cells lack a cell membrane. b. plant cells lack spindle fibers. c. animal cells lack a cell plate. d. animal cells lack cytokinesis

The correct option is C.
Mitosis occur in both plants and animal cells. The difference in mitosis between the plant and animal cells occur during the cytokineses stage. In this stage, the animal cells form cleavages which gives rise to daughter cells. Because of the rigid cell wall that is present in plants they can not form cleavages, instead they form cell plate at the center of the dividing cells; this cell plate separate the newly formed cells.