$(a)$ List any two structural differences and two similarities between a plant cell and an animal cell.
$(b)$ What would happen if an animal cell is kept in distilled water for $24$ hours?

(N/A) Differences:

Plant Cell	Animal Cell
$(i)$ Presence of cell wall.	$(i)$ Cell wall is absent.
$(ii)$ Large central vacuole is present.	$(ii)$ Vacuoles are small or absent.
$(iii)$ Plastids are present.	$(iii)$ Plastids are absent.

Similarities:
$(i)$ Both possess a cell membrane.
$(ii)$ Both contain a nucleus.
$(iii)$ Both contain cytoplasm and various cell organelles.
$(b)$ When an animal cell is placed in distilled water (a hypotonic solution),water enters the cell through the process of osmosis. As a result,the cell will swell and eventually burst because animal cells lack a rigid cell wall to withstand the internal turgor pressure.