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Question 19N.3.HL.TZ0.15b

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.3.HL.TZ0.15b
Level HL Paper 3 Time zone TZ0
Command term Outline Question number b Adapted from N/A
b.
[Maximum mark: 1]
19N.3.HL.TZ0.15b

The table below summarizes the number and percentage of marine species worldwide with at least one documented record of becoming entangled and at least one record of ingesting marine debris, such as plastics and fishing nets.

[Source: Küehn et al. 2015 (http://edepot.wur.nl/344861)]

(b)

Outline how plastic ingestion may lead to biomagnification in these marine species.

[1]

Markscheme

a. plastic broken down into microplastics to be able to enter the food chain ✔

b. plastic/microplastics become more concentrated at each trophic level ✔ 

Accept descriptions of biomagnification involving any of the species in the table.

Syllabus sections