There is a race between pathogens, which need to grow and reproduce in other organisms, and the organisms they infect. Humans use various ways to keep themselves and their crops free of disease.
What word describes the removal of faeces and waste from a building?
What happened to the number of measles cases in 1969 after the vaccine had been introduced the year before?
The number of cases went up
The number of cases went down
The number remained the same
Spores that survive cooking are made by which kind of pathogen?
Which epidemic could more accurately be described as a pandemic?
The world-wide flu epidemic of 1918
Over 11,000 people died in the Ebola outbreak in West Africa in 2013
Over 20,000 people died in the Canadian typhus outbreak of 1847
Condoms can protect a person against infection from which of the following?
STIs including HIV/AIDS
STIs excluding HIV/AIDS
Why are crops made of cloned plants the most susceptible to pathogens?
They are the same species
They are grown in monoculture
They are genetically identical
Why are crop plants planted as a polyculture less susceptible to pathogens than plants in a monoculture?
Monocultures are more densely planted than polycultures
In a polyculture plants of each species are surrounded by different species
Crop plants which are grown in monoculture are always clones
When dead pathogens are injected as a vaccine what happens first?
A type of white blood cell makes antibodies
A type of white blood cell becomes a memory cell
A type of white blood cell ingests and destroys the inactive pathogens
The MMR protects against which diseases?
Measles, mumps, rubella
Measles, meningitis, rubella
Measles, mumps, rotavirus
Why is reproducible scientific data considered to be the best evidence?
It means that the scientist has always got the same results under the same conditions.
It means that many scientists were able to get the same or similar results under similar conditions.
It means that the scientist who did the research had lots of control experiments.