Strategy for covering the entire Botany syllabus for the UPSC optional subject exam:

1. Understand the Syllabus:
- Familiarize yourself with the entire syllabus for the Botany optional subject exam.
- Read and comprehend each topic, sub-topic, and key concepts mentioned in the syllabus.

2. Make a Study Plan:
- Create a comprehensive study plan that covers all the topics mentioned in the syllabus.
- Allocate specific time slots for each topic based on its importance and complexity.
- Ensure that you have enough time for revision and practice.

3. Collect Study Materials:
- Gather all the necessary study materials such as textbooks, reference books, previous years' question papers, and study notes.
- Utilize online resources like EduRev for accessing study materials, notes, and mock tests specifically designed for the UPSC optional subject exam.

4. Start with the Basics:
- Begin your preparation by revising the basic concepts of Botany.
- Focus on understanding the fundamental principles, terminology, and classification systems.
- Strengthen your foundation before moving on to advanced topics.

5. Follow a Systematic Approach:
- Follow a systematic approach while studying each topic.
- Break down complex topics into smaller sub-topics and study them one by one.
- Make concise notes while studying to aid in quick revisions.

6. Use Diagrams and Flowcharts:
- Botany involves the study of various structures, processes, and relationships.
- Use diagrams, flowcharts, and illustrations to understand and remember complex concepts.
- Practice drawing and labeling diagrams to enhance your understanding.

7. Practice Previous Years' Question Papers:
- Solve previous years' question papers to get an idea of the exam pattern and types of questions asked.
- Analyze your performance and identify areas that need improvement.
- Practice writing answers within the given time limit to improve speed and accuracy.

8. Focus on Important Topics:
- Identify the important topics based on previous years' question papers and exam trends.
- Allocate more time and effort to thoroughly understand and revise these topics.
- Pay attention to topics that have a higher weightage in the syllabus.

9. Revision and Mock Tests:
- Regularly revise the topics you have studied to reinforce your understanding.
- Take mock tests and solve sample papers to assess your knowledge and time management skills.
- Analyze your performance in mock tests and work on improving weak areas.

10. Stay Updated:
- Keep yourself updated with recent advancements and developments in the field of Botany.
- Read scientific journals, research papers, and current affairs related to Botany.
- Stay connected with online platforms like EduRev for updated study materials and resources.

Remember: Consistency, dedication, and regular practice are key to covering the entire Botany syllabus for the UPSC optional subject exam. Stick to your study plan, stay motivated, and seek clarification if needed.