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IB Biology SL D4.1.6 Traits Must Be Heritable Questions

Explain why natural selection can change a population only when advantageous traits are encoded in inherited genetic variation.

Syllabus
First assessment 2025
Course
Biology SL
Level
SL

Exam points

  • Identify genetic variation and heritable advantageous traits as requirements for natural selection.

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Study D4.1.6—Traits must be heritable conceptsOpen the corresponding Concept lesson for explanations, examples and exam connections.

IB Biology SL D4.1.6 Traits Must Be Heritable Questions question 1

[Maximum number: 1]

What is required for natural selection to occur?

I. Acquired characteristics
II. Advantageous characteristics
III. Genetic variation

A

I only

B

I and III only

C

II and III only

D

I, II and III

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