TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: A skeleton that consists of hard, mineralized structures located within the soft tissue of organisms is called endoskeleton.

SOLUTION: A skeleton that consists of hard, mineralized structures located within the soft tissue of organisms is called what?

PROBLEM: When an atom gains or loses an electron it becames a(n) ion.

SOLUTION: When an atom gains or loses an electron it becames an?

PROBLEM: One might find deciduous trees in a humid continental climate.

SOLUTION:
In what type of climate might one find deciduous trees?