What happens to the minerals when heat is used in the formation of metamorphic rocks?

They form new minerals.

Explanation:

Heat causes minerals to change their physical structure. They will form new minerals that are more stable in the new environment.

desert perennials often survive by remaining dormant during dry periods of the year, then springing to life when water becomes available. most annual desert plants germinate only after heavy seasonal rain, then complete their reproductive cycle very quickly.