Tiny organisms are microscopic life forms that can be found in a variety of environments. ALGA (4 letters) is a type of photosynthetic organism that lives in aquatic environments, such as oceans, lakes, and rivers. Ameba (5 letters) is a single-celled organism that moves by extending its pseudopodia. AMOEBA (6 letters) is a type of protozoan that moves by extending its pseudopodia. MICROBE (7 letters) is a general term for any microscopic organism, including bacteria, fungi, and viruses. All of these tiny organisms are important components of the global ecosystem.