Singapore Junior Biology Olympiad Past Papers | EXTENDED — 2026 |

A student uses a respirometer to measure oxygen consumption in crickets at 20°C and 30°C.

(b) Using a Punnett square or branch diagram, determine the phenotypic ratio of the offspring. (4 marks) singapore junior biology olympiad past papers

(b) Explain the concept of countercurrent exchange in fish gills and explain why it is more efficient than concurrent flow. (4 marks) A student uses a respirometer to measure oxygen

(e) Describe one real-world application of Mendelian genetics in agriculture. (2 marks) singapore junior biology olympiad past papers