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Question 19N.3.SL.TZ0.9b

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.3.SL.TZ0.9b
Level SL Paper 3 Time zone TZ0
Command term Suggest Question number b Adapted from N/A
b.
[Maximum mark: 1]
19N.3.SL.TZ0.9b

A study was carried out in Brazil on the transfer of pollen (cross-pollination) from transgenic strains to non-transgenic strains of soybean (Glycine max). The transgenic crop was resistant to the herbicide glyphosate. The graph below shows the percentage of cross-pollination between transgenic and non-transgenic crops in fields separated by different distances.

[Source: S Abud, et al., (2007), Gene flow from transgenic to nontransgenic soybean plants in the Cerrado region of Brazil,
Genetics and Molecular Research, 6 (2), pages 445–452]

(b)

Using the data, suggest one recommendation to farmers who plant transgenic soybeans.

[1]

Markscheme

separate fields by at least 5m because at this distance no cross pollination occurs ✔

Needs a reason.

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