CAIE A Level Biology 9700 · Transport in plants
A student examines prepared slides of transverse sections of a root and a stem from a herbaceous dicotyledonous plant (e.g., a sunflower). Describe the distribution of xylem and phloem visible in each section, and state two differences between the arrangements observed.
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Describe means: Say what happens or what something is like, in order and with detail. You are not being asked why. If there is data, quote it: name the trend, then give figures with units at the points where it changes.
Written by Markquill to follow the Cambridge International syllabus. Markquill is independent and is not affiliated with or endorsed by Cambridge International.