In this task, find the most appropriate number to replace the blank (indicated with _ ) and express it in words.

[Q]: Urushiol oil can be active on any surface for _ years and possibly longer.
[A]: five


[Q]: Grasshoppers develop through _ to six instars.
[A]: five


[Q]: Salamanders have less-specialized morphologies than do the other _ orders.
[A]:
two