TASK DEFINITION: Given scientific fact as input, generate the question from this fact such that it can be answered from the input.
PROBLEM: Rod is the general shape of centrioles.

SOLUTION: What is the general shape of centrioles?

PROBLEM: The size and symmetry of a beetle's or an elk's antlers or a grasshopper's song communicate rather clearly their state of health.

SOLUTION: The size and symmetry of a beetle's or an elk's antlers or a grasshopper's song communicate rather clearly their state of what?

PROBLEM: Streak is a more reliable trait or measure to identify minerals.

SOLUTION:
Which is a more reliable trait or measure to identify minerals?