instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Eyespots do the cells in the front of a volvox typically develop to help swim towards light.
answer:
What do the cells in the front of a volvox typically develop to help swim towards light?


question:
Smaller size of ring will a summer drought cause in a tree.
answer:
What size of ring will a summer drought cause in a tree?


question:
Sodium element is responsible for one-half of the osmotic pressure gradient that exists between the interior of cells and their surrounding environment.
answer:
What element is responsible for one-half of the osmotic pressure gradient that exists between the interior of cells and their surrounding environment?