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Plant Hormones

Topic 11: Plant Hormones

Study this topic

1

Tropisms — Plant Responses to Stimuli

Notes2

Auxin — How It Works

Notes3

Commercial Uses of Plant Hormones

Notes4

How It Works: Auxin and Phototropism

How It Works5

Key Definitions

Definitions6

Common Misconceptions

Misconceptions7

Memory Aids

Memory Aid8

Higher Gibberellins in Agriculture and Ethylene in Fruit Ripening

Higher Tier9

Exam Focus

Exam Focus10

Knowledge Organiser

Summary11

Exam Tips: Plant Hormones

Exam Tips

Sample 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.

Sample Questions

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

15

exam-style questions

20

revision flashcards

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