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IB Biology SL D4.1.7 Sexual Selection Questions

Explain how mate choice favours inherited displays, ornaments or courtship behaviours that increase reproductive success.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Identify a courtship display or ornament and explain how mate choice increases reproductive success.

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Study D4.1.7—Sexual selection conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology SL D4.1.7 Sexual Selection Questions question 1

[Maximum number: 1]

A bird of paradise (Ptiloris victoriae) has very showy plumage and demonstrates a unique dance.

Figure for Question IB Biology SL D4.1.7 Sexual Selection Questions question 1 — IB Biology SL

What type of selection pressure could have caused this plumage to evolve?

A

Interspecific competition

B

Abiotic factors

C

Paradigm shift

D

Sexual selection

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