What are the biological significance of the crystal formations in the plant cell's vacuole?

Answer 1

Protection! It discourages insects from chewing on the leaves. The crystals are hard enough and large enough to damage the mouth parts of insects.

Answer 2

They are usually waste products that the plant has no way to excrete, so it hides them in the vacuole.

The significance is that they demonstrate an ingenuous way around the lack of having an excretory system like higher organisms.

Answer 3

They are biological molecules that break down into crystal meth