Given the question: Q: What is a gram stain used to identify ? Read this paragraph and choose the correct option from the provided answers: Different types of bacteria stain a different color when Gram stain is applied to them. This makes them easy to identify. Some stain purple and some stain red, as you can see in Figure below . The two types differ in their outer layers. This explains why they stain differently. Choices: - radioactivity - acids or bases - different types of liquids - different types of bacteria A:
The answer is:
different types of bacteria