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Question 18N.3.HL.TZ0.d

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Date November 2018 Marks available [Maximum mark: 2] Reference code 18N.3.HL.TZ0.d
Level HL Paper 3 Time zone TZ0
Command term Suggest Question number d Adapted from N/A
d.
[Maximum mark: 2]
18N.3.HL.TZ0.d

An investigation into food web interactions was conducted in mesocosms in the Mediterranean Sea, off the coast of France. The effects of the addition of soil and fish on bacterial populations were tested.

Suggest advantages of undertaking this experiment in the sea rather than in the laboratory.

[2]

Markscheme

a. conditions closer to levels experienced naturally by the organism ✔
OWTTE

b. natural variation of abiotic variables ✔
Accept examples, eg: temperature, dissolved oxygen

c. more natural behaviour/interactions ✔

d. not harm organisms by removing them from natural habitat ✔

 

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