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Plant Signal Path

A plant can pass a quick electrical signal from cell to cell through its tissues. This signal can travel from a damaged leaf down the stem toward the roots.

In the picture

  1. A glowing pulse in a stem channel: the electrical signal moving through plant tissue.
  2. A junction between two plant cells: the point where the signal passes from one cell to the next.
  3. A torn leaf edge: the damaged spot that starts the signal.

Examples

  • A leaf touched by a falling twig sends a signal along the stem.
  • A caterpillar bite on a leaf starts a fast internal message.

Quiz: Plant Signal Path (Age 10)

  1. How do plant cells pass information from one cell to the next?

    • By passing electrical signals from cell to cell
    • By sending only water from cell to cell
    • By making new leaves on every cell
  2. What can these electrical signals help a plant react to?

    • The number of seeds in a flower
    • Only the temperature of the soil
    • Light, touch, or damage
  3. After a leaf is damaged, where can the signal travel?

    • From one leaf to another without using cells
    • From the roots up to the flowers only
    • From the damaged leaf down the stem toward the roots

The answers, each with its explanation, are in the app. This lesson has left the free week, so its quiz is part of the subscription.

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Science, Age 10