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

Input: Consider Input: Simple carbohydrates can be classified in terms of chain length.

Output: Which carbohydrates can be classified in terms of chain length?

Input: Consider Input: Seedless and seed are the two divisions of vascular plants.

Output: What are the two divisions of vascular plants?

Input: Consider Input: Seed dormancy ensures that seeds germinate only when conditions for seedling survival are optimal.
Output: What ensures that seeds germinate only when conditions for seedling survival are optimal?