2. Getting a paycheck every two weeks is an example of a -fixed ratio schedule
-variable interval schedule
-variable ratio schedule
-fixed interval schedule

Inspired by the example of that great cornellian, vladimir nabokov, some of your friends have become amateur lepidopterists (they study butterflies). often when they return from a trip with specimens of butterflies, it is very difficult for them to tell how many distinct species they've caught— to the fact that many species look very similar to one another. solution

How can a person be self justified he or she is proceeding in legal ways

Which at first gave the south an edge in the civil war? a. a better-equipped army b. the invention of ironclad ships c. the drafting of slaves into the army