Step 1: Understand what a modified stem is. A modified stem is a part of a plant that has changed from its original form to serve a different purpose.
Step 2: Identify the examples given: tuber, rhizome, and bulb.
Step 3: Research each example: A tuber (like a potato) stores nutrients, a rhizome (like ginger) grows horizontally underground, and a bulb (like an onion) stores energy.
Step 4: Confirm that all these examples are indeed modified stems because they all serve different functions than a typical stem.
Step 5: Conclude that the answer to the question is that all the options listed (tuber, rhizome, and bulb) are examples of modified stems.
