Lets Think Over These Questions

Lets think over these questions

graph TD; A["Let's think over these questions"] --> B["Biology"]; B --> C["Cell Biology"]; B --> D["Genetics"]; B --> E["Evolution"]; B --> F["Ecology"]; B --> G["Physiology"]; C --> H["What are cells?"]; D --> I["What is DNA?"]; E --> J["What is natural selection?"]; F --> K["What is an ecosystem?"]; G --> L["How do organisms function?"];