DP Biology (first assessment 2025)

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Question 23M.1B.SL.TZ2.b

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Date May 2023 Marks available [Maximum mark: 1] Reference code 23M.1B.SL.TZ2.b
Level SL Paper 1B Time zone TZ2
Command term Suggest Question number b Adapted from N/A
b.
[Maximum mark: 1]
23M.1B.SL.TZ2.b

Laboratory-scale mesocosms were built to investigate the effect of very small contaminants (nanoparticles) on ramshorn snails (Planorbarius corneus).

[Source: Material from: Auffan, M., Tella, M., Santaella, C., Brousset, L., Pailles, C., Barakat, M., Espinasse, B., Artells, E., Issartel,
J., Masion, A., Rose, J., Wiesner, M.R., Achouak, W., Thiery, A. and Bottero, J.-Y., An adaptable mesocosm platform
for performing integrated assessments of nanomaterial risk in complex environmental systems, published 2014, Nature
Scientific Reports, reproduced with permission of SNCSC.]

Suggest one advantage of using a mesocosm in this type of research.

[1]

Markscheme

environmentally safe/cheaper/control of variables easier;

Syllabus sections