Given scientific fact as input, generate the question from this fact such that it can be answered from the input.

Input: Consider Input: Chordates include vertebrates and invertebrates that have a notochord.

Output: Chordates include vertebrates and invertebrates that have what?


Input: Consider Input: Most have cells that are not able to exchange gases with the outside environment do multicellular organisms need transport systems.

Output: Why do multicellular organisms need transport systems?


Input: Consider Input: A shallow area of sediment near the shore best describes the part of the ocean called the continental shelf.


Output: Which best describes the part of the ocean called the continental shelf?