So let me see if I can clear it up for you,
Macro evolution is when one kind of critter becomes another kind of a critter.
That's no help.
You are being asked for an
operational definition. Given two organisms, any two organisms, how do you determine whetehr they are separated by macroevolution or not? IOW, how do you assign two arbitrarily chosen organisms to the category "one kind of critter" or assign one to the category "one kind of critter" and the other to the category "another kind of critter", without asking you to do the assigning?
Of course, you don't have a prayer of actually doing this, but that's what's being asked.
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