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IB Biology HL D3.1.10 Promoting Cross Pollination Questions

Trace how pollen transfer between different plants increases variation, then compare dioecy, self-incompatibility and different maturation times as mechanisms that promote cross-pollination.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify dioecy—plants with separate male and female individuals—as a mechanism that promotes cross-pollination.

IB Biology HL D3.1.10 Promoting Cross Pollination Questions question 1

[Maximum number: 1]

Flowering plants can use either self-pollination or cross-pollination when they carry out sexual reproduction. Which plants are most likely to cross-pollinate?

A

Plants that are hermaphrodites

B

Plants whose anthers and stigmas mature at the same time

C

Plants with flowers that have much longer stamens than stigmas

D

Plants that are either male or female

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