It depends on the frog, if there the same then most likey. However some frogs may fight so try it out and if the start bumping into each other alot then separate them. (Make sure there the same size because some like to eat other frogs.)
No. Unless you put it in a tank with sand.
put a bunch of leopard frogs together and see which ones reproduce.
No. Goldfish are a cold water fish and African dwarf frogs are tropical. Their waters carry different bacteria and they can make each other very sick.
science?
When I initially put dwarf frogs into my tank with blood parrot cichlids, the fish attempted to bite onto the feet of the frogs thinking it was food, or something. After the first day they left each other alone and there have been no problems since then.
A$$ holes happen
Snail Orgy!
You would die.
When two rainbows are put together in photoshop.
They Repel.
Not neccessarily immediately but yes they will mate but a pregnancy will only happen if the female is 'ready'. This question should be in a different category.
Frogs in nature do not have lights they turn on at night.