Acidity, number of ovaries, skin type etc. It's fairly complicated and the simplest chart I could find was here: http://waynesword.palomar.edu/fruitid1.htm
The six fruit groups and some examples of each are:Pomes-apples and pearsDrupes-peaches and cherriesBerries-blueberries, strawberries, and grapesMelons-watermelon, honeydew, and...
Yes and No. If it is mostly alcoholic drink then No. But if you let's say mix 1/3 lemonade and 2/3 fruit juice then Yes. See? It depends on what you put in it. The food groups are about food you eat...