Answer:
A:in isotonic solution both cells remain of same size.
B:in hypotonic solution , both cells will expand in size but due to the rigid plant cell wall it will not be able to expand to the degrees of an animal cell.
C:in hypertonic solutions , both cells will shrink in size
Step-by-step explanation:
hypotonic solutions means that the osmolarity is less than that of the cellular cytoplasm(like less salt in water than that of cytoplasm), so water moves from low concentration(the solution with less salt) to high concentration(the solution with more salt). Therefore in case of hypotonic water moves from surrounding solution to inside of cell thus expanding the size.
Vice versa is true for hypertonic solution.
So just remember water moves from low concentration of solute(salt) to high concentration.
*content in brackets is for better understanding