Q33 - Diagnosing Whether a Tendril Is a Modified Leaf or Modified Stem
Many climbing plants have tendrils, a thread-like organ specialized for winding around or clinging to a support. While tendrils are typically modified leaves, some tendrils are modified stems, which can be distinguished by morphological inspection (photos of Vicia sativa and Cayratia japonica tendrils shown).
Figure 1.
Figure 2.
Using the information and data, determine which of the statements are true or which are false.
most informative observation. For a tendril sample, which of the following observations is most informative for judging whether it is a modified leaf or a modified stem?
Question reproduced from IBO 2020, Theoretical Exam 2, licensed under CC BY-NC-SA 4.0 - attributed to the International Biology Olympiad. Open the full exam PDF · Community solutions (unofficial)