[Solved] A lipid membrane is present in which of the following? A) naked viruses B) enveloped viruses C) prions D) viroids E) both prions and viroids Woodrow Wilson: The 28th President of the United States (1913-1921), known for his leadership during World War I and his advocacy for the League of Nations. Theodore Roosevelt: The 26th President of the United States (1901–1909) known for his vigorous foreign policy, conservation efforts, and progressive policies. Economic Concentration: Economic concentration refers to a condition in an industry or market where a small number of companies or entities hold a large share of the market, leading to reduced competition and potentially higher prices for consumers. Theodore Roosevelt: The 26th president of the United States, notable for his exuberant personality, range of interests and achievements, and his leadership of the Progressive Movement.