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
Levels of greenhouse gases in the atmosphere are increasing.
.1Which two gases are greenhouse gases that contribute to global warming? Tick two boxes.
[2 marks] .2Which two are biological consequences of global warming? Tick two boxes.
[2 marks] 4 marksFoundation
Pathogens are microorganisms that cause infectious disease.
.1Which type of pathogen causes measles?
[1 mark] .2How is measles spread from person to person?
[1 mark] .3Which two actions reduce the spread of salmonella food poisoning? Tick two boxes.
[2 marks] 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
Some disorders are inherited. Sex is also determined by inherited chromosomes.
.1Polydactyly causes extra fingers or toes. What causes polydactyly?
[1 mark] .2Cystic fibrosis is a disorder of which part of the cell?
[1 mark] .3Give the sex chromosomes of a human female.
[1 mark] 