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Years later, as SJBO’s youngest head judge, Li Wen revisits the red sanders tree. Her daughter, clutching a sketch of a leaf fossil, whispers, “Where’s the next challenge?” The cycle continues.

: Some past participants sell compiled notes and papers on platforms like SJBO 2026 Key Details Target Audience : Secondary 2 to 4 students (ages 14–16) [11]. Theory Round Date : Scheduled for May 6, 2026 Exam Format : A 2-hour theory round often conducted via the Classmarker platform [11, 15]. Core Topics Tested singapore+junior+biology+olympiad+past+papers+exclusive

: Vascular structure, growth, and responses to stimuli. Years later, as SJBO’s youngest head judge, Li

A student observes that red blood cells shrink when placed in solution X. Which of the following is most likely true about solution X? A) It is hypotonic to the cell. B) It is hypertonic to the cell. C) It has the same water potential as the cell. D) It contains a membrane transport inhibitor. Theory Round Date : Scheduled for May 6,