3 marksFoundation
A food chain on a farm is: grass → rabbit → fox.
.1What is the grass in this food chain?
[1 mark] .2What do the arrows in a food chain show?
[1 mark] .3In a stable community, what usually happens to the fox population after the rabbit population increases?
[1 mark] 4 marksFoundation
Differences in the characteristics of individuals in a population are called variation.
.1Which two characteristics are caused only by the genes a person inherits? Tick two boxes.
[2 marks] .2What is a mutation?
[1 mark] .3Name the process by which organisms best suited to their environment are more likely to survive and breed.
[1 mark] 3 marksFoundation
The human body has several ways of stopping pathogens entering.
.1How does the nose help to stop pathogens entering the body?
[1 mark] .2The stomach helps to defend the body against pathogens.
Name the substance the stomach produces that kills pathogens.
[1 mark] .3Malaria is caused by a protist. How is it passed from person to person?
[1 mark] 2 marksFoundation
Many drugs were first found in plants or microorganisms.
.1Penicillin was discovered by Alexander Fleming. Where does penicillin come from?
[1 mark] .2A new drug is tested before it can be prescribed. Put the stages in order, starting with the first.
[1 mark] 3 marksFoundation
The distribution of organisms in a habitat depends on abiotic and biotic factors.
.1Which two are abiotic factors? Tick two boxes.
[2 marks] .2Which resource do plants in a community compete for?
[1 mark] 