Scientific line icons for DNA, petri dish, microscope, and pipette

A clean black line illustration presents four science and laboratory icons arranged in a simple two-by-two layout on a white background. The upper left symbol is a DNA helix, while the upper right shows a petri dish. Below, a microscope appears on the left and a pipette with a droplet sits on the right. The minimal vector style uses even strokes, rounded forms, and generous negative space, giving the set a crisp, editorial feel. High contrast makes each icon easy to read for medical, biotech, and research design use. The composition feels orderly and modern, suitable for presentations, educational materials, or website graphics that need clear scientific imagery.