Yes, solving previous years question papers can help in understanding the important diagrams and figures related to the Zoology optional subject. Here's how:

1. Familiarity with Exam Pattern:
- Solving previous years' question papers gives you an idea of the exam pattern and the type of questions asked.
- It helps you identify the areas and topics that are frequently covered in the exam.

2. Identification of Important Diagrams and Figures:
- While solving previous years' papers, you will come across questions that require you to analyze and interpret diagrams and figures.
- By practicing these questions, you can identify the important diagrams and figures that are commonly asked in the exam.

3. Understanding the Application of Concepts:
- Questions based on diagrams and figures often test your understanding of the concepts and their application.
- By analyzing and solving such questions, you can gain a deeper understanding of the concepts and their practical implications.

4. Revision and Retention:
- Solving previous years' question papers helps in revising the topics and concepts that are relevant to the diagrams and figures.
- It aids in retaining the information for a longer period as it reinforces your learning through practice.

5. Time Management:
- Practicing previous years' papers helps in improving your time management skills.
- It allows you to familiarize yourself with the time constraints of the exam and helps you strategize your approach accordingly.

6. Self-Assessment:
- Solving previous years' papers enables you to assess your knowledge and understanding of the subject.
- By reviewing your answers, you can identify your strengths and weaknesses related to diagrams and figures.
- This self-assessment helps in identifying the areas that require further improvement and focus.

Conclusion:
Solving previous years' question papers is an effective strategy to understand the important diagrams and figures related to the Zoology optional subject. It helps in familiarizing yourself with the exam pattern, identifying important diagrams and figures, understanding the application of concepts, revising and retaining information, improving time management skills, and assessing your knowledge. Regular practice of previous years' papers can enhance your overall preparation and boost your confidence for the exam.