DP Biology (last assessment 2024)

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Question 23M.3.HL.TZ1.a

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Date May 2023 Marks available [Maximum mark: 2] Reference code 23M.3.HL.TZ1.a
Level HL Paper 3 Time zone TZ1
Command term Outline Question number a Adapted from N/A
a.
[Maximum mark: 2]
23M.3.HL.TZ1.a

Outline how the prickly pear cactus may become an ecological problem in Kruger National Park.

[2]

Markscheme
  1. they can become an invasive species because they lack predators
    OR
    uncontrolled population growth due to lack of predators;
  2. compete with local/endemic species for nutrients/habitat;
  3. may cause (endemic) species to become extinct/reduction in numbers;
Examiners report

Many candidates were able to get one or two marks for this question. They understood that the prickly pear cactus could become an invasive species and how that could affect native species.

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