Plant Defences Flashcards

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Note: We may include questions that have multiple correct answers. It’s useful to remember specific examples to understand these concepts better.

What are the physical defences of plants against pathogens?

Physical defences include the cellulose cell wall, bark, and the waxy cuticle, which act as barriers to prevent pathogen entry.

How do plants use chemical defences to protect against pathogens?

Plants produce antimicrobial chemicals, like those from mint and witch hazel, and toxins, like those in stinging nettles, to deter pathogens and herbivores.

What is an example of a plant with antimicrobial properties?

Mint and witch hazel produce antimicrobial chemicals that protect against pathogens and are used in antiseptic products.

How do thorns and hairs protect plants?

Thorns and hairs make it unpleasant or painful for herbivores to touch or eat the plant, as seen in brambles and cacti.

What is mimicry in plants and give an example?

Mimicry is when plants manipulate their appearance to confuse herbivores or pollinators.

For example, the hammer orchid mimics a female wasp to lure males for pollination.

How do drooping leaves protect plants from herbivores?

Some plants, like Mimosa pudica, have leaves that droop or curl when touched, which knocks insects off and makes it harder for them to feed on the plant.

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