Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
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Question: Most have cells that are not able to exchange gases with the outside environment do multicellular organisms need transport systems.

Answer: Why do multicellular organisms need transport systems?


Question: Oil is the most commonly used source of energy in the world.

Answer: What is the most commonly used source of energy in the world?


Question: Exemplified by canada and alaska, a subarctic climate has cool, short summers and long, cold winters, little precipitation, and abundant conifers.

Answer:
Exemplified by canada and alaska, what kind of climate has cool, short summers and long, cold winters, little precipitation, and abundant conifers?