Question 19M.3.HL.TZ1.d.ii
| Date | May 2019 | Marks available | [Maximum mark: 1] | Reference code | 19M.3.HL.TZ1.d.ii |
| Level | HL | Paper | 3 | Time zone | TZ1 |
| Command term | Label | Question number | d.ii | Adapted from | N/A |
Red dye was added to the water in the potometer. A cross section of the stem was observed under the light microscope.
[Source: Nbnidhi, https://commons.wikimedia.org/wiki/File:Transverse_section_of_dicot_stem.jpg]
Label with a C the tissue where organic compounds are transported.
[1]
[Source: Nbnidhi, https:// commons.wikimedia.org/wiki/ File:Transverse_section_of_dicot _stem.jpg]
Award [1] for correct labeling of C
This was another question that was difficult for students. This question again required students to understand one of the skills from the subject guide, this time in topic 9.2 (Identification of xylem and phloem in microscope images of stem and root). Student responses to this question, however, suggested that few students could identify phloem and xylem under a microscope.
