Edexcel IGCSE Biology 2.85 Auxin and Phototropism Questions

Auxin moves to the shaded side of a shoot, promoting growth there. Study its role in phototropism and how plant transport differs from animal hormones.

Syllabus
First assessment 2019
Course
Biology 4BI1

Exam points

  • Explain how auxin moves to the shaded side of a shoot and causes greater elongation, bending it towards light.
  • Complete a passage linking animal hormone transport in blood with auxin-driven shoot phototropism.
  • Explain why some biologists do not classify auxin as a hormone, using its transport or site of production.

Edexcel IGCSE Biology 2.85 Auxin and Phototropism Questions question 1

[Maximum number: 2]

Plants respond to stimuli.
Some of these responses are called tropic responses.

Describe the role of auxin in plant responses to light.

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