Homeostasis & ResponseStudy Notes

Tropisms — Plant Responses to Stimuli

Part of Plant Hormones — GCSE Biology

This study notes covers Tropisms — Plant Responses to Stimuli within Plant Hormones for GCSE Biology. Topic 11: Plant Hormones It is section 1 of 11 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 1 of 11

Practice

15 questions

Recall

20 flashcards

🌱 Tropisms — Plant Responses to Stimuli

Plants respond to stimuli but more slowly than animals:

Tropism	Response to	Example
Phototropism	Light	Shoots grow towards light (positive)
Geotropism/Gravitropism	Gravity	Roots grow down (positive); shoots grow up (negative)

Keep building this topic

Read this section alongside the surrounding pages in Plant Hormones. That gives you the full topic sequence instead of a single isolated revision point.

Auxin — How It Works Commercial Uses of Plant Hormones How It Works: Auxin and Phototropism

Practice Questions for Plant Hormones

When a plant shoot is lit from one side, where does auxin accumulate?

A. On the side facing the light
B. Equally on both sides
C. On the shaded side, away from the light
D. At the base of the shoot

1 markfoundation

Explain how auxin causes gravitropism (geotropism) in plant roots.

3 marksstandard

Quick Recall Flashcards

What are plant hormones?

Chemical substances that control various aspects of plant growth, development, and responses to environmental stimuli.

How does phototropism work?

Auxin concentrates on the darker side of the plant, causing cells there to elongate more, bending the plant stem toward the light source.

Want to test your knowledge?

PrepWise has 15 exam-style questions and 20 flashcards for Plant Hormones — with adaptive difficulty and instant feedback.

Join Alpha

Back to

Plant Hormones

Auxin — How It Works