They can range in size from just a few inches tall to more than 12 feet in the case of the tree ferns. Some types of ferns are tropical. Others quite hardy. Their versatility aside, ferns are valuable in the home and garden because they prefer shade. In the landscape, ferns bring fresh green life to those hard-to-design dim corners.
Prokaryotic cells have various shapes; the four basic shapes are: Cocci - spherical Bacilli - rod shaped Spirochaete - spiral shaped Vibrio - comma shaped.
Prokaryotes microorganisms can be further classified into three domains: eukarya, bacteria and archaea. This can become a bit confusing as these two are similar in looks and can often be confused based on look alone, though these are different from each other in many ways.