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Plants slow growth quickly by changing enzyme activity — Level A1 — A green parrot perched on a millet stalk.

Plants slow growth quickly by changing enzyme activityCEFR A1

28 Mar 2026

Adapted from Jules Bernstein - UC Riverside, Futurity CC BY 4.0

Photo by Amit Rai, Unsplash

Level A1 – Beginner
1 min
60 words
  • Plants can slow their growth very fast.
  • Plant leaves react to strong light or heat.
  • This change helps the plant survive stress.
  • Enzymes inside cells change how they work.
  • The plant does not wait to make new proteins.
  • Slowing growth saves energy for the plant.
  • Later the plant makes longer changes to cope.
  • These lasting changes can make plants smaller.

Difficult words

  • growththe process of getting bigger over time
  • reactto change because of something outside
  • surviveto stay alive in difficult conditions
  • enzymea protein in cells that helps reactions
    Enzymes
  • proteina substance cells use to build parts
    proteins
  • energypower that living things use to work

Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.

Discussion questions

  • Do you have plants at home?
  • Have you seen leaves change in strong light or heat?
  • What do you do if a plant is small?

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