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Question 18N.2.HL.TZ0.b

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Date November 2018 Marks available [Maximum mark: 5] Reference code 18N.2.HL.TZ0.b
Level HL Paper 2 Time zone TZ0
Command term Describe Question number b Adapted from N/A
b.
[Maximum mark: 5]
18N.2.HL.TZ0.b

Describe the roles of the shoot apex in the growth of plants.

[5]

Markscheme

a. shoot apex is an «apical» meristem/has undifferentiated cells ✔

b. mitosis «in shoot apex» ✔

c. cell division/cytokinesis/cells produced «in shoot apex» ✔

d. cell elongation «in shoot apex» ✔

e. stem/shoot growth «due to the cell division and elongation in the shoot apex» ✔

f. produces auxin ✔

g. auxin stimulates growth/cell elongation ✔

h. growth towards light ✔

i. differentiation of cells «produced by the shoot apex» ✔

j. leaf initiation/leaf development begins/leaf «primordia» formation «at shoot apex» ✔

k. flowers produced «by shoot apex» ✔

Syllabus sections