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IB Biology HL A3.1.12 Biological species concept Question Bank

Practise IB Biology HL A3.1.12 by explaining how asexual reproduction and horizontal gene transfer complicate the biological species concept in bacteria.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Outline how asexual reproduction and horizontal gene transfer make bacterial species boundaries difficult to apply.

A3.1.12 (HL)—Difficulties with biological species concept question 1

[Maximum number: 1]

The gut of a healthy human contains more than 1000 species of bacteria. Some of these species are shown in the cladogram.

Figure for Question A3.1.12 (HL)—Difficulties with biological species concept question 1 — IB Biology HL

Outline a difficulty in applying the biological species concept to bacteria.

One additional mark is available for the construction of your answers for each question.

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