TASK DEFINITION: In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.
PROBLEM: Conserved residues make similar contacts in _ repressor-operator complexes.

SOLUTION: two

PROBLEM: Wild alfalfa is fairly drought resistant, with roots going down _ feet.

SOLUTION: ten

PROBLEM: Men are at least _ times more likely to die from suicide in the U.S. than women.

SOLUTION:
four