Ginger and turmeric are examples of modified stem named as

Solution (By Examveda Team)

Ginger and turmeric are examples of modified stems named Rhizome.
Rhizome, also called creeping rootstalk, horizontal underground plant stem capable of producing the shoot and root systems of a new plant.
Rhizomes are used to store starches and proteins and enable plants to perennate (survive an annual unfavourable season) underground.