colony characteristics of fungus and algae in petri dish for education.

abstract algae background backgrounds bacteria bacterium biological biology biotechnology brown characteristics closeup colonies colony color concept culture cyanobacteria danger detail dirty disease dish educat education environment environmental flora food frame freshwater fungal fungi fungus germs gray green growing growth lab laboratory lichen light macro micro microbe microbial microbiology microorganism microscope mold mould natural nature old organism pattern petri research risk rough round safety samples science spores surface texture white yeast