Plant defence responses

Question 1

what are the 3 main defence systems against attack

Answer 1

physical response
chemical response
mechanical response

Question 2

what microorganisms can plants be attacked by?

Answer 2

viruses, fungi …..

Question 3

what else can plants be attacked by besides microorganisms

Answer 3

insects and animals such as herbivores

Question 4

what does a cell wall in plants do to help with defence of physical response against attack?

Answer 4

makes it difficult for microorganisms such as bacteria to penetrate

Question 5

what 2 things do plants have to help with physical response defending

Answer 5

cell wall

waxy cuticle

bark

Question 6

how is the waxy cuticle beneficial for a plants physical defence?

Answer 6

the waxy cuticle makes it difficult for microorganisms to penetrate which protects the plant from attack

Question 7

what is bark
what does bark do
how is this beneficial to help defend chemically?

Answer 7

bark is found on trees and is a barrier to entry by microorganisms
as bark ages it eventually falls off and is replaced with fresh bark underneath

Question 8

what can plants do as a chemical response to defend themselves chemically?

Answer 8

release anti bacterial chemicals which kill bacteria and prevent them attacking the plant

release poisons to deter herbivores from grazing on the plant

Question 9

sharp thorns are an example of what type of defence?

Answer 9

mechanical response

Question 10

what can sharp thorns be protected from?

Answer 10

eaten by a herbivore

Question 11

name 2 ways plants have a mechanical response to defend and protect

Answer 11

plants have hairs which irritate the mouth of herbivores

sharp thorns

plants that have special leaves which curl or droop when touched to scare off herbivores

mimicry, white dead nettle looks very similar to a stinging nettle but has no sting

Question 12

how can hairs on plants be beneficial fro protection?

Answer 12

it can irritate the mouth of herbivores making the plan difficult to eat

Question 13

how can white dead nettle be a good mechanical response even tho it doesn’t sting?

Answer 13

the white dead nettle looks very similar to a stinging nettle but has no sting
herbivores are less likely to eat white dead nettle as they can easily mistake it for a stinging nettle, protecting the white nettle from being eaten