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IB Biology HL C3.1.23 Hl Ethylene and Fruit Ripening Questions

Ethylene is a gaseous plant hormone that promotes fruit ripening. As ripening fruit releases more ethylene, nearby fruit ripens faster through positive feedback in IB Biology HL C3.1.23.

Syllabus
First assessment 2025
Course
Biology HL
Level
HL

Exam points

  • Identify ethylene as the gaseous hormone that promotes fruit ripening, and explain how more ethylene released by ripening fruit creates positive feedback in nearby fruit.

IB Biology HL C3.1.23 Hl Ethylene and Fruit Ripening Questions question 1

[Maximum number: 1]

What plays a direct role in promoting the ripening of fruit?

A

Oestradiol

B

Auxin

C

Cytokines

D

Ethylene

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