question: What type of biomes have water containing little or no salt?
distractor3: marine biomes
distractor1: coastal biomes
distractor2: aquatic biomes
correct_answer: freshwater biomes
support: Freshwater biomes have water that contains little or no salt. They include standing and running freshwater biomes. Standing freshwater biomes include ponds and lakes. Lakes are generally bigger and deeper than ponds. Some of the water in lakes is in the aphotic zone where there is too little sunlight for photosynthesis. Plankton and plants (such as the duckweed in Figure below ) are the primary producers in standing freshwater biomes.