seamless horizontal border of unicellular green blue algae chlorella spirulina with large cells single-cells with lipid

algae algal ameoba bacteria bacterium biodiesel biology biosynthesis biotech biotechnology blue border chlorella design diet droplets element emerald energy environment environmental food green horizontal illustration lipid macro medical membrane microalgae microscope molecule natural nature oil organism production research science scientific seamless singlecell spirulina sustainable vegetarian virus watercolor