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] 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] 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] 3 marksFoundation
Human activities affect biodiversity.
.1What is biodiversity?
[1 mark] .2Which two human activities can pollute water? Tick two boxes.
[2 marks] 4 marksFoundation
A student tests some foods for starch, sugar and protein.
.1Which solution does the student use to test for starch?
[1 mark] .2The student heats a food with Benedict's solution. The food contains a lot of glucose.
What colour does the mixture turn?
[1 mark] .3Name the solution used to test for protein.
[1 mark] .4Suggest why the student heats the Benedict's test tubes in a water bath rather than directly over a Bunsen burner.
[1 mark] 