Pathogens are disease-causing viruses, bacteria, fungi or protists which attack plants as well as animals. Plants have physical and chemical defences against pathogens.
What treatment is used for rose black spot?
What plants are aphids often found on?
What is magnesium used for?
To make chlorophyll
To make proteins
To grow root hairs
How are mineral ions absorbed by plants?
Through their bark
Through the roots
From the air into leaves
Which of these is not a physical barrier against infection?
Cellulose cell walls
Why have nettles evolved stings?
To stop being eaten by herbivores
To protect from pathogens
To transmit diseases
What plant can fold and drop its leaves?
The passion flower vine
The bee orchid
Why does the passion flower vine have spots on its leaves?
Because it does not have enough magnesium
Because it is always infected by a pathogen
To look like butterfly eggs
Why is leaf damage so serious for plants?
Photosynthesis occurs in the leaf
Respiration occurs here
Water is absorbed here
What disease causes yellow and white patterns on leaves? -Higher
Tobacco mosaic virus
Rose black spot