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Question 18M.1.HL.TZ2.28

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Date May 2018 Marks available [Maximum mark: 1] Reference code 18M.1.HL.TZ2.28
Level HL Paper 1 Time zone TZ2
Command term Question number 28 Adapted from N/A
28.
[Maximum mark: 1]
18M.1.HL.TZ2.28

Prickly pear cactus plants are well adapted to desert conditions. The stems are the flattened structures visible in the image and the leaves are reduced to spines. The white spots in the image are groups of spines.

[Source: Stan Shebs/Wikimedia. File licensed under CC BY-SA 3.0 (https://creativecommons.org/licenses/by-sa/3.0/)]

Which characteristic describes the advantage of one of their adaptations?

A. Leaves are reduced to spines to lose less carbon dioxide.

B. Spines increase surface area for more photosynthesis.

C. Stems are flattened to allow more water to be stored between periods of rain.

D. Waxy cuticle on the stems is very thin to allow rapid absorption of rain.

 

[1]

Markscheme

A

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