Improving answer writing skills for Paper II of UPSC Zoology Optional Subject requires a systematic approach and practice. Here are some tips to enhance your answer writing skills effectively:

1. Understand the Syllabus:
- Familiarize yourself with the syllabus of the Zoology Optional Subject in Paper II. This will help you identify the important topics and prioritize your preparation accordingly.

2. Thorough Study of the Topics:
- Read and understand the core concepts, theories, and principles related to each topic in the syllabus.
- Refer to standard textbooks, reference materials, and previous year question papers to gain in-depth knowledge and clarity.

3. Develop a Structured Approach:
- Begin each answer with a brief introduction to provide context and set the tone for the response.
- Organize your answer using headings and subheadings to create a logical flow of information.
- Use bullet points (HTML bullet points) to highlight key points within each section.

4. Clear and Concise Writing:
- Write in a clear and concise manner, avoiding unnecessary jargon or complex language.
- Use simple and coherent sentences to convey your thoughts effectively.
- Ensure proper grammar, punctuation, and spelling to maintain clarity and coherence.

5. Diagrams and Flowcharts:
- Incorporate relevant diagrams, flowcharts, or tables wherever necessary to support your answer.
- Use appropriate labeling and annotations to make the visual representation more understandable.

6. Examples and Case Studies:
- Supplement your answer with real-life examples, case studies, or research findings to strengthen your arguments.
- Connect the examples to the concepts being discussed to showcase your understanding.

7. Time Management:
- Practice writing answers within the prescribed time limit to improve your speed and efficiency.
- Allocate sufficient time to each question based on its weightage and complexity.
- Review and revise your answers if time permits to rectify any errors or add extra points.

8. Mock Tests and Evaluation:
- Regularly attempt mock tests and previous year question papers to simulate the exam environment.
- Evaluate your answers critically, identifying areas of improvement and learning from your mistakes.
- Seek expert feedback or join a test series to get valuable insights and suggestions for improvement.

Remember, consistent practice and self-evaluation are key to enhancing your answer writing skills. Focus on understanding the concepts, organizing your thoughts effectively, and presenting the information in a concise and coherent manner.