9-1 Plant defences

What covers leaves and stems of most plants acting as a physical barrier to stop pathogens entering?

What term describes passion flowers having small yellow spots on its leaves that look like the eggs left behind by butterflies?

The presence of large thorns on roses is what type of defence?

• Chemical

• Mechanical

• Physical

• Mimicry

The plant cell has a cellulose cell wall which acts as another barrier against infection. Identify this type of defence.

• Physical

• Chemical

• Mimicry

• Mechanical

What type of chemicals are produced by plants such as mint and witch hazel produce to limit the spread of bacteria?

Identify the type of defence provided by the berries of the deadly nightshade plant.

• Mechanical

• Chemical

• Physical

• Mimicry

Some plants droop or curl when animals touch them - identify this type of defence.

• Chemical

• Physical

• Mechanical

• Mimicry

State the term for animals that only eat plants

State the term for an insect that eats plants useful to humans

The outer bark of trees is what type of defence?