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Question 19N.3.SL.TZ0.4c

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Date November 2019 Marks available [Maximum mark: 1] Reference code 19N.3.SL.TZ0.4c
Level SL Paper 3 Time zone TZ0
Command term State Question number c Adapted from N/A
c.
[Maximum mark: 1]
19N.3.SL.TZ0.4c

The development of the neural tube in the frog Xenopus is shown in the diagram.

[Source: reprinted by permission from Nature Reviews Neuroscience, Gammill, L., Bronner-Fraser, M.
Neural crest specification: migrating into genomics. Nat Rev Neurosci 4, 795–805 (2003) doi:10.1038/nrn1219]

(c)

State a consequence of incomplete folding of the neural tube in humans.

[1]

Markscheme

spina bifida ✔

Accept a description of spina bifida

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