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Question 18N.3.HL.TZ0.14b

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Date November 2018 Marks available [Maximum mark: 1] Reference code 18N.3.HL.TZ0.14b
Level HL Paper 3 Time zone TZ0
Command term Identify Question number b Adapted from N/A
b.
[Maximum mark: 1]
18N.3.HL.TZ0.14b

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.

(b)

Assuming that the populations of bacteria are under bottom-up control, identify the mesocosms in which the bacterial populations will be highest.

[1]

Markscheme

soil and no fish «mesocosm» AND soil and fish «mesocosm» ✔

Both mesocosms required

Accept answers such as “the two with soil”.

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