Pathogens and Disease 1
a) Draw one line from each disease to the type of microorganism that causes it. Disease
Type of Microorganism
rose black spot
protozoan
salmonella
fungus
measles
virus
malaria
bacterium
[3]
b) Complete the sentences using the words from the list. host
Anopheles
Plasmodium
protozoan
red
vectors
because they carry malaria.
Mosquitoes are
The mosquito’s blood carries the malaria pathogen, which is called
.
The mosquito is a parasite because it feeds on a living organism, called the 2
.
[3]
Human Immunodeficiency Virus (HIV) is a pathogen that can cause AIDS. a) Give two ways that HIV can be passed on from one person to another.
[2] b) AIDS stands for Acquired Immunodeficiency Syndrome. Why is it called ‘immunodeficiency’?
[2] 3
A gardener discovers that one of his rose bushes has black spot disease. A friend advises him to burn any infected leaves rather than put them in the compost heap. Why does she suggest this?
[2] Total Marks Topic-Based Questions
227841 AQA Higher Tier Combined Science All-in-One_P286_310.indd 295
/ 12
295
6/29/16 12:19 PM