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IB Biology HL A3.1.2 Species As Groups with Shared Traits Questions

Species can be grouped by shared morphological and structural traits. The morphological species concept is useful in fieldwork, with fossils and for many plants, but sexual dimorphism and variation within a species can make classification difficult.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Group species using shared morphological and structural traits.
  • Explain why the morphological species concept is useful in fieldwork, with fossils and for many plants.
  • Explain how sexual dimorphism and variation within a species can make morphological classification difficult.

IB Biology HL A3.1.2 Species As Groups with Shared Traits Questions question 1

[Maximum number: 2]

The diagram shows the range of heights and brain sizes found in four groups of hominids.

Figure for Question IB Biology HL A3.1.2 Species As Groups with Shared Traits Questions question 1 — IB Biology HL

Distinguish between the characteristics of the Australopithecus and H. erectus using the data.

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