Singapore Junior Biology Olympiad Past Papers Review

The diagram (described in text) shows a cross-section of a human lung alveolus and a fish gill filament.

A plant with purple flowers and round leaves (heterozygous for both traits) is self-crossed. 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) The diagram (described in text) shows a cross-section

(c) If 320 offspring are produced, how many are expected to have purple flowers and pointed leaves? Show your working. (2 marks) (4 marks) (c) If 320 offspring are produced,

(a) Draw a labeled diagram of a simple respirometer suitable for this experiment. (3 marks)

(a) State the genotype of the parent plant. (1 mark)

This is a development of modeled exactly on the style and difficulty of the Singapore Junior Biology Olympiad (SJBO) . Since actual past papers are copyrighted, this serves as a faithful simulation for training.