instruction:
Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
question:
Poles parts of the planet does solar energy have difficulty reaching.
answer:
What parts of the planet does solar energy have difficulty reaching?


question:
Adding the number of protons plus the number of neutrons in an atom decides its approximate mass; atomic number is another word for this value.
answer:
Adding the number of protons plus the number of neutrons in an atom, decides it's approximate mass, what is another word for this value?


question:
Differences between organisms reflect differences between their nucleotide sequences rather than between their genetic codes.
answer:

Differences between organisms reflect differences between their nucleotide sequences rather than between their what?