Petri Dish with Dual-Layer Culture Medium - Lab Visualization #38088 (License: Personal Use)

This schematic depicts a standard petri dish with a transparent lid and two distinct horizontal layers of culture medium: a lighter tan upper layer and a darker brown lower layer. The layers suggest differential nutrient composition or selective agents, often employed in enrichment or isolation techniques. The clean, minimal design emphasizes structural clarity for educational or protocol reference use.

Used in microbiology textbooks, lab manuals, online science courses, and research presentations to illustrate layered agar techniques such as streaking on selective media, antibiotic gradient assays, or dual-culture co-cultivation setups. Matches user intent for visual learning, protocol design, or scientific communication.