This little guy (about an inch tall) was discovered to have cells that photosynthesize.  (Scientists hypothesize that the mouth is only used to deter predators in a form of mimicry.) Interestingly,  scientists noted that its cells do not have cell walls.

This little guy is a single-celled, microscopic organism that has no nucleus.  After performing a Gram stain, scientists determined that it has cell walls made of peptidoglycan.

This multicellular monster is comprised of cells with no cell walls, and it actually ate the scientist who discovered that!

This microscopic little bugger is unicellular with no cell walls.

The cell walls of this lumbering beast were determined to be composed of chitin.

Scientists determined that these unicellular organisms (pictured in green attached to the hair of a larger organism) photosynthesize, have no nucleus, and have cell walls that do not contain peptidoglycan.

Although menacing in appearance, this multicellular monstrosity was found to be entirely autotrophic. (The scientist stuck in its back happened purely by accident!)  Under closer examination, its cells appeared to be surrounded by cell walls made of cellulose.

This prickly character was discovered to be composed of a single spike-shaped, eukaryotic cell.  Surprisingly, its cell was surrounded by cell walls that were not made of chitin.  It was also seen ingesting (eating) small bits of food from the surrounding environment.

This unicellular, photosynthetic organism contains no nucleus and has cell walls containing peptidoglycan.