Concept Map: What are the higher levels of biological organization? Launch the Concept Map by clicking the button below. Read the instructions that appear on the new screen. Drag the terms and phrases to build a Concept Map. Click “Submit” in the Concept Map when finished. Which phrase best summarizes the relationships in the concept map? Natural selection acts on organisms, but evolution occurs in populations. Natural selection acts on populations, but evolution occurs in organisms. Natural selection acts on populations, and evolution occurs in populations. Natural selection acts on organisms, and evolution occurs in organisms.