For CBSE Class 10 Biology pre-boards, focusing on high-weightage chapters like Life Processes, Control and Coordination, and How do Organisms Reproduce is essential, as these frequently feature diagrams of the human heart, excretory system, and female reproductive system. Key topics often include the double circulation mechanism, reflex actions, vegetative propagation, and Mendel’s laws of inheritance, which are commonly presented as competency-based or case-study questions in the current board pattern. Mastering these "do-or-die" concepts and practicing the previous years' 5-mark subjective questions can significantly boost your pre-board scores and finalize your preparation for the 2026 board exams. You can download the complete list of CBSE Class 10 Biology important questions with detailed solutions by visiting the following link: https://school.careers360.com/boards/cbse/cbse-class-10-science-most-important-questions