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IB Biology SL A4.1.3 Evidence From Selective Breeding Questions

Explain how selecting heritable variation changes populations and use real selective-breeding examples as evidence for evolution.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Explain how humans select heritable variation and breed organisms over generations to change inherited characteristics.
  • Use selective-breeding examples in dogs, cattle or crops as evidence that populations can evolve.

Learn this topic

Study A4.1.3—Evidence from selective breeding conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology SL A4.1.3 Evidence From Selective Breeding Questions question 1

[Maximum number: 1]

Jersey (Bos taurus) is a breed of cattle. Cows of this breed produce higher milk yields than cows from other cattle breeds.

Figure for Question IB Biology SL A4.1.3 Evidence From Selective Breeding Questions question 1 — IB Biology SL

What has caused this breed to produce higher milk yields than other cattle breeds?

A

Natural selection

B

Selective breeding

C

Adaptive radiation

D

Random mutations

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