How do the structures of a vacuole and a nucleus differ? A. a vacuole is enclosed within a membrane ,and a nucleus is not enclosed within a membrane.
B. a vacuole is thick fluid , and nucleus is rigid set layers
C. a vacuole contain no water , and a nucleus a mostly water
D. a vacuole contain mostly water, and a nucleus contain mostly DNA

D

Explanation:

Vacuoles are pockets that collect water and the cell's junk. The nucleus sends commands to other cell parts and contains DNA.

Why it isn't A: Both have membranes.

Vacuole- tonoplast. Nucleus- Nuclear membran.

Why it isn't B: The Vacuole is not a thick fluid, though it may hold thick fluid.

Why it isn't C: This should be obvious.

the answer is c on e2020, bud.