From what i have read up on in the past, They can but they don't really think with a "voice" in their head if that makes sense.
Answer:
Frogs have smooth or slimy skin that is moist, whereas toads have thicker, bumpy skin that is usually dry. All toads are poisonous, while frogs are not.
A good passing current is a small wave for example.
Answer:
eukaryotic, because our body cells have nucleus and membrane-bound organelles
Bacteriophage, also called phage or bacterial viruses, any of a group of viruses that infect bacteria.