phacus pond water drop under a microscope

alga algae algal alge animal background bacteria biology biotechnology black blue bright celled chlorella ciliate colored colour colourful dark design dirty division drop education euglena euglenozoa eukaryotes evolution experiment fauna filaments flagellate flora food genus green heterotrichs heterotrophic lab leafshaped life light lights living micro microscope microscopic microscopy organism other pellicle phacus phytoplankton plankton pond protists protozoa red single water yellow zooplankton