Question 19N.3.HL.TZ0.b
| Date | November 2019 | Marks available | [Maximum mark: 1] | Reference code | 19N.3.HL.TZ0.b |
| Level | HL | Paper | 3 | Time zone | TZ0 |
| Command term | Suggest | Question number | b | Adapted from | N/A |
Scientists have constructed systems to reproduce the conditions of natural wetlands. The mesocosms below were used to study nutrient removal from water flowing through.
[Source: © 2013. Silviya Lavrova and Bogdana Koumanova (October 2nd 2013). Nutrients and Organic Matter Removal in a
Vertical-Flow Constructed Wetland, Applied Bioremediation – Active and Passive Approaches, Yogesh B. Patil and
Prakash Rao, IntechOpen, DOI: 10.5772/56245. Available from: https://www.intechopen.com/books/applied-bioremediationactive-
and-passive-approaches/nutrients-and-organic-matter-removal-in-a-vertical-flow-constructed-wetland]
Suggest with a reason which system best reproduces the conditions of the natural environment.
[1]
a. horizontal flow/«figure» B because it is larger
OR
horizontal flow/«figure» B contains more/several plants ✔
b. horizontal flow/«figure» B because it works by natural flow
OR
horizontal flow/«figure» B because it works without a pump ✔ Do not accept river instead of flow.
