Subject: What are the main differences between a tropical rain forest and dry forest?

The assignment I am doing is to make a a brochure of general information on a
specific biome (I chose tropical forest) and requires one of my sources to be
an expert on ecosystems. When I googled "tropical forest", the majority of the 
links were information on tropical rain forets. I was wondering what the major 
differences were between a rain and dry forest, apart from apart from the 
length of dry season and amount of precipitation. Do they still have the same 
layers?

Re: What are the main differences between a tropical rain forest and dry forest?