Biology Topic Practice

Plant Mechanical Defences

Mechanical defences are physical adaptations that deter herbivores or help the plant escape danger.

How does "mimicry" help a plant stay safe?

What is Plant Mechanical Defences?

"Mechanical defences are physical adaptations of plants that deter herbivores through movement or structure."

Question 1

Which statement accurately describes plant mechanical defences at a GCSE level?

Question 2

Which is an example of a plant mechanical defence?

Question 3

How do hairs on plant leaves or stems help protect the plant?

Question 4

Why are drooping or curling leaves sometimes considered a mechanical defence?

Survival Tools

Thorns and hairs deter animals from touching or eating the plant.

Leaves that droop or curl when touched to knock insects off.

Mimicry to trick animals into thinking the plant is unhealthy or dangerous.

Exam Tip

Mimosa pudica is a famous plant that moves its leaves mechanically when touched.

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