512x512pxbacteria icons, microbiota symbols, black and white line art, petri dishes illustration, pathogen, scientific diagram, monochrome biology graphics
600x600pxheart sketch, human heart anatomy, monochrome organ drawing, patricia visser art, cardiovascular system illustration, medical biology diagram, black and white anatomy chart
486x750pxDNA tree illustration, monochrome family tree, genealogical DNA art, genetic code tree, evolutionary biology art, organic DNA line art, hereditary tree design
513x800pxoptical microscope drawing, monochrome biology illustration, black and white scientific instrument, microscopic laboratory equipment, laboratory research tool visuals, education biology resource graphics, microscope image
980x816pxspermatozoon illustration, black and white sperm cell, monochrome reproductive cell drawing, line art spermatozoon, human fertility symbol, microscopic male gamete, reproductive biology diagram
550x850pxFamily Tree DNA tattoo, nucleic acid double helix art, black and white tree of life, phylogenetic tree illustration, genetic lineage artwork, evolutionary biology design, monochrome DNA helix drawing
